- 08 Dec, 2013 10 commits
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Jason Wang authored
[ Upstream commit 96f8d9ec ] We currently use hdr_len as a hint of head length which is advertised by guest. But when guest advertise a very big value, it can lead to an 64K+ allocating of kmalloc() which has a very high possibility of failure when host memory is fragmented or under heavy stress. The huge hdr_len also reduce the effect of zerocopy or even disable if a gso skb is linearized in guest. To solves those issues, this patch introduces an upper limit (PAGE_SIZE) of the head, which guarantees an order 0 allocation each time. Signed-off-by:
Jason Wang <jasowang@redhat.com> Cc: Stefan Hajnoczi <stefanha@redhat.com> Cc: Michael S. Tsirkin <mst@redhat.com> Signed-off-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Jukka Rissanen authored
[ Upstream commit 1188f054 ] If priority/traffic class field in IPv6 header is set (seen when using ssh), the uncompression sets the TC and Flow fields incorrectly. Example: This is IPv6 header of a sent packet. Note the priority/TC (=1) in the first byte. 00000000: 61 00 00 00 00 2c 06 40 fe 80 00 00 00 00 00 00 00000010: 02 02 72 ff fe c6 42 10 fe 80 00 00 00 00 00 00 00000020: 02 1e ab ff fe 4c 52 57 This gets compressed like this in the sending side 00000000: 72 31 04 06 02 1e ab ff fe 4c 52 57 ec c2 00 16 00000010: aa 2d fe 92 86 4e be c6 .... In the receiving end, the packet gets uncompressed to this IPv6 header 00000000: 60 06 06 02 00 2a 1e 40 fe 80 00 00 00 00 00 00 00000010: 02 02 72 ff fe c6 42 10 fe 80 00 00 00 00 00 00 00000020: ab ff fe 4c 52 57 ec c2 First four bytes are set incorrectly and we have also lost two bytes from destination address. The fix is to switch the case values in switch statement when checking the TC field. Signed-off-by:
Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by:
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Felix Fietkau authored
[ Upstream commit 52f48d0d ] Since commit 7b0c5f21 "sierra_net: keep status interrupt URB active", sierra_net triggers status interrupt polling before the net_device is opened (in order to properly receive the sync message response). To be able to receive further interrupts, the interrupt urb needs to be re-submitted, so this patch removes the bogus check for netif_running(). Signed-off-by:
Felix Fietkau <nbd@openwrt.org> Tested-by:
Dan Williams <dcbw@redhat.com> Signed-off-by:
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Veaceslav Falico authored
[ Upstream commit ec9f1d15 ] Currently the ARP monitoring is not supported with 802.3ad, and it's prohibited to use it via the module params. However we still can set it afterwards via sysfs, cause we only check for *LB modes there. To fix this - add a check for 802.3ad mode in bonding_store_arp_interval. Signed-off-by:
Veaceslav Falico <vfalico@redhat.com> CC: Jay Vosburgh <fubar@us.ibm.com> CC: Andy Gospodarek <andy@greyhouse.net> Signed-off-by:
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Daniel Borkmann authored
[ Upstream commit 51c37a70 ] For properly initialising the Tausworthe generator [1], we have a strict seeding requirement, that is, s1 > 1, s2 > 7, s3 > 15. Commit 697f8d03 ("random32: seeding improvement") introduced a __seed() function that imposes boundary checks proposed by the errata paper [2] to properly ensure above conditions. However, we're off by one, as the function is implemented as: "return (x < m) ? x + m : x;", and called with __seed(X, 1), __seed(X, 7), __seed(X, 15). Thus, an unwanted seed of 1, 7, 15 would be possible, whereas the lower boundary should actually be of at least 2, 8, 16, just as GSL does. Fix this, as otherwise an initialization with an unwanted seed could have the effect that Tausworthe's PRNG properties cannot not be ensured. Note that this PRNG is *not* used for cryptography in the kernel. [1] http://www.iro.umontreal.ca/~lecuyer/myftp/papers/tausme.ps [2] http://www.iro.umontreal.ca/~lecuyer/myftp/papers/tausme2.ps Joint work with Hannes Frederic Sowa. Fixes: 697f8d03 ("random32: seeding improvement") Cc: Stephen Hemminger <stephen@networkplumber.org> Cc: Florian Weimer <fweimer@redhat.com> Cc: Theodore Ts'o <tytso@mit.edu> Signed-off-by:
Daniel Borkmann <dborkman@redhat.com> Signed-off-by:
Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by:
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Hannes Frederic Sowa authored
[ Upstream commit f8c31c8f ] Fixes a suspicious rcu derference warning. Cc: Florent Fourcot <florent.fourcot@enst-bretagne.fr> Signed-off-by:
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Duan Jiong authored
[ Upstream commit f104a567 ] As the rfc 4191 said, the Router Preference and Lifetime values in a ::/0 Route Information Option should override the preference and lifetime values in the Router Advertisement header. But when the kernel deals with a ::/0 Route Information Option, the rt6_get_route_info() always return NULL, that means that overriding will not happen, because those default routers were added without flag RTF_ROUTEINFO in rt6_add_dflt_router(). In order to deal with that condition, we should call rt6_get_dflt_router when the prefix length is 0. Signed-off-by:
Duan Jiong <duanj.fnst@cn.fujitsu.com> Acked-by:
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Andreas Henriksson authored
[ Upstream commit 13eb2ab2 ] When trying to delete a table >= 256 using iproute2 the local table will be deleted. The table id is specified as a netlink attribute when it needs more then 8 bits and iproute2 then sets the table field to RT_TABLE_UNSPEC (0). Preconditions to matching the table id in the rule delete code doesn't seem to take the "table id in netlink attribute" into condition so the frh_get_table helper function never gets to do its job when matching against current rule. Use the helper function twice instead of peaking at the table value directly. Originally reported at: http://bugs.debian.org/724783Reported-by:
Nicolas HICHER <nhicher@avencall.com> Signed-off-by:
Andreas Henriksson <andreas@fatal.se> Signed-off-by:
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Amir Vadai authored
[ Upstream commit 1ec4864b ] timecounter_init() was was called only after first potential timecounter_read(). Moved mlx4_en_init_timestamp() before mlx4_en_init_netdev() Signed-off-by:
Amir Vadai <amirv@mellanox.com> Signed-off-by:
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Hannes Frederic Sowa authored
[ Upstream commit 0e033e04 ] Commit 1e2bd517 ("udp6: Fix udp fragmentation for tunnel traffic.") changed the calculation if there is enough space to include a fragment header in the skb from a skb->mac_header dervived one to skb_headroom. Because we already peeled off the skb to transport_header this is wrong. Change this back to check if we have enough room before the mac_header. This fixes a panic Saran Neti reported. He used the tbf scheduler which skb_gso_segments the skb. The offsets get negative and we panic in memcpy because the skb was erroneously not expanded at the head. Reported-by:
Saran Neti <Saran.Neti@telus.com> Cc: Pravin B Shelar <pshelar@nicira.com> Signed-off-by:
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- 04 Dec, 2013 30 commits
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Greg Kroah-Hartman authored
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Wei Liu authored
With the introduction of "xen-netback: Don't destroy the netdev until the vif is shut down" (upstream commit id 279f438e), vif disconnect and free are separated. However in the backported version reference counting code was not correctly modified, and the reset of vif->irq was lost. If frontend goes through vif life cycle more than once the reference counting is skewed. This patch adds back the missing vif->irq reset line. It also moves several lines of the reference counting code to vif_free, so the moved code corresponds to the counterpart in vif_alloc, thus the reference counting is balanced. Signed-off-by:
Wei Liu <wei.liu2@citrix.com> Acked-by:
Ian Campbell <ian.campbell@citrix.com> Cc: Konrad Wilk <konrad.wilk@oracle.com> Cc: David Vrabel <david.vrabel@citrix.com> Signed-off-by:
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Stanislaw Gruszka authored
commit c1de4a95 upstream. 4965 version of Eric patch "iwl3945: better skb management in rx path". It fixes several problems : 1) skb->truesize is underestimated. We really consume PAGE_SIZE bytes for a fragment, not the frame length. 2) 128 bytes of initial headroom is a bit low and forces reallocations. 3) We can avoid consuming a full page for small enough frames. Signed-off-by:
Stanislaw Gruszka <sgruszka@redhat.com> Acked-by:
Eric Dumazet <edumazet@google.com> Signed-off-by:
John W. Linville <linville@tuxdriver.com> Signed-off-by:
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Eric Dumazet authored
commit 45fe142c upstream. Steinar reported reallocations of skb->head with IPv6, leading to a warning in skb_try_coalesce() It turns out iwl3945 has several problems : 1) skb->truesize is underestimated. We really consume PAGE_SIZE bytes for a fragment, not the frame length. 2) 128 bytes of initial headroom is a bit low and forces reallocations. 3) We can avoid consuming a full page for small enough frames. Reported-by:
Steinar H. Gunderson <sesse@google.com> Signed-off-by:
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Johannes Koch authored
commit b43ea806 upstream. Patch to make TeVii S471 cards use the ts2020 tuner, since ds3000 driver no longer contains tuning code. Signed-off-by:
Johannes Koch <johannes@ortsraum.de> Signed-off-by:
Mauro Carvalho Chehab <m.chehab@samsung.com> Signed-off-by:
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Michal Kubecek authored
commit c13a84a8 upstream. Commit 68b80f11 (netfilter: nf_nat: fix RCU races) introduced RCU protection for freeing extension data when reallocation moves them to a new location. We need the same protection when freeing them in nf_ct_ext_free() in order to prevent a use-after-free by other threads referencing a NAT extension data via bysource list. Signed-off-by:
Michal Kubecek <mkubecek@suse.cz> Signed-off-by:
Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by:
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Emmanuel Grumbach authored
commit 8ca95995 upstream. This triggers automatic bug reports and add no valuable information. Print a simple error instead and drop the host command. Signed-off-by:
Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by:
Johannes Berg <johannes.berg@intel.com> Signed-off-by:
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Alex Deucher authored
commit b852c985 upstream. HW ACR support may have issues on some older chips, so use SW ACR for now until we've tested further. Signed-off-by:
Alex Deucher <alexander.deucher@amd.com> CC: Rafał Miłecki <zajec5@gmail.com> Signed-off-by:
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Alex Deucher authored
commit ee0fec31 upstream. Use the hw generated values rather than calculating them in the driver. There may be some older r6xx asics where this doesn't work correctly. This remains to be seen. See bug: https://bugs.freedesktop.org/show_bug.cgi?id=69675Signed-off-by:
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Alex Deucher authored
commit e7d12c2f upstream. The drm code that calculates the 1001 clocks rounds up rather than truncating. This allows the table to match properly on those modes. See bug: https://bugs.freedesktop.org/show_bug.cgi?id=69675Signed-off-by:
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Alex Deucher authored
commit 062c2e43 upstream. Avoid losing precision. See bug: https://bugs.freedesktop.org/show_bug.cgi?id=69675 v2: fix math as per Anssi's comments. Signed-off-by:
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Nanno Langstraat authored
commit 43c83146 upstream. Use case: people who use both Apple and PC keyboards regularly, and desire to keep&use their PC muscle memory. A particular use case: an Apple compact external keyboard connected to a PC laptop. (This use case can't be covered well by X.org key remappings etc.) Signed-off-by:
Nanno Langstraat <langstr@gmail.com> Signed-off-by:
Jiri Kosina <jkosina@suse.cz> Signed-off-by:
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Tristan Rice authored
commit e17f5d76 upstream. This is a patch that adds the new Mayflash Gamecube Controller to USB adapter (ID 1a34:f705 ACRUX) to the ACRUX driver (drivers/hid/hid-axff.c) with full force feedback support. Signed-off-by:
Tristan Rice <rice@outerearth.net> Signed-off-by:
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Stefan Achatz authored
commit e078809d upstream. Forgot two special driver declarations and sorted the list. Signed-off-by:
Stefan Achatz <erazor_de@users.sourceforge.net> Signed-off-by:
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Stefan Achatz authored
commit 7be63f20 upstream. Add missing switch breaks. Signed-off-by:
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Stefan Achatz authored
commit 14fc4290 upstream. Ryos uses a new return value for critical errors, others have been confirmed. Signed-off-by:
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David Howells authored
commit 124df926 upstream. Remove the certificate date checks that are performed when a certificate is parsed. There are two checks: a valid from and a valid to. The first check is causing a lot of problems with system clocks that don't keep good time and the second places an implicit expiry date upon the kernel when used for module signing, so do we really need them? Signed-off-by:
David Howells <dhowells@redhat.com> cc: David Woodhouse <dwmw2@infradead.org> cc: Rusty Russell <rusty@rustcorp.com.au> cc: Josh Boyer <jwboyer@redhat.com> cc: Alexander Holler <holler@ahsoftware.de> Signed-off-by:
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Mauro Carvalho Chehab authored
commit 9736a89d upstream. Dynamic static allocation is evil, as Kernel stack is too low, and compilation complains about it on some archs: drivers/media/dvb-frontends/s5h1420.c:851:1: warning: 's5h1420_tuner_i2c_tuner_xfer' uses dynamic stack allocation [enabled by default] Instead, let's enforce a limit for the buffer. In the specific case of this frontend, only ttpci uses it. The maximum number of messages there is two, on I2C read operations. As the logic can add an extra operation, change the size to 3. Signed-off-by:
Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by:
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Mauro Carvalho Chehab authored
commit 8393796d upstream. Dynamic static allocation is evil, as Kernel stack is too low, and compilation complains about it on some archs: drivers/media/dvb-frontends/bcm3510.c:230:1: warning: 'bcm3510_do_hab_cmd' uses dynamic stack allocation [enabled by default] drivers/media/dvb-frontends/itd1000.c:69:1: warning: 'itd1000_write_regs.constprop.0' uses dynamic stack allocation [enabled by default] drivers/media/dvb-frontends/mt312.c:126:1: warning: 'mt312_write' uses dynamic stack allocation [enabled by default] drivers/media/dvb-frontends/nxt200x.c:111:1: warning: 'nxt200x_writebytes' uses dynamic stack allocation [enabled by default] drivers/media/dvb-frontends/stb6100.c:216:1: warning: 'stb6100_write_reg_range.constprop.3' uses dynamic stack allocation [enabled by default] drivers/media/dvb-frontends/stv6110.c:98:1: warning: 'stv6110_write_regs' uses dynamic stack allocation [enabled by default] drivers/media/dvb-frontends/stv6110x.c:85:1: warning: 'stv6110x_write_regs' uses dynamic stack allocation [enabled by default] drivers/media/dvb-frontends/tda18271c2dd.c:147:1: warning: 'WriteRegs' uses dynamic stack allocation [enabled by default] drivers/media/dvb-frontends/zl10039.c:119:1: warning: 'zl10039_write' uses dynamic stack allocation [enabled by default] Instead, let's enforce a limit for the buffer. Considering that I2C transfers are generally limited, and that devices used on USB has a max data length of 64 bytes for the control URBs. So, it seem safe to use 64 bytes as the hard limit for all those devices. On most cases, the limit is a way lower than that, but this limit is small enough to not affect the Kernel stack, and it is a no brain limit, as using smaller ones would require to either carefully each driver or to take a look on each datasheet. Signed-off-by:
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Mauro Carvalho Chehab authored
commit 37ebaf68 upstream. Dynamic static allocation is evil, as Kernel stack is too low, and compilation complains about it on some archs: drivers/media/dvb-frontends/af9013.c:77:1: warning: 'af9013_wr_regs_i2c' uses dynamic stack allocation [enabled by default] drivers/media/dvb-frontends/af9033.c:188:1: warning: 'af9033_wr_reg_val_tab' uses dynamic stack allocation [enabled by default] drivers/media/dvb-frontends/af9033.c:68:1: warning: 'af9033_wr_regs' uses dynamic stack allocation [enabled by default] drivers/media/dvb-frontends/bcm3510.c:230:1: warning: 'bcm3510_do_hab_cmd' uses dynamic stack allocation [enabled by default] drivers/media/dvb-frontends/cxd2820r_core.c:84:1: warning: 'cxd2820r_rd_regs_i2c.isra.1' uses dynamic stack allocation [enabled by default] drivers/media/dvb-frontends/rtl2830.c:56:1: warning: 'rtl2830_wr' uses dynamic stack allocation [enabled by default] drivers/media/dvb-frontends/rtl2832.c:187:1: warning: 'rtl2832_wr' uses dynamic stack allocation [enabled by default] drivers/media/dvb-frontends/tda10071.c:52:1: warning: 'tda10071_wr_regs' uses dynamic stack allocation [enabled by default] drivers/media/dvb-frontends/tda10071.c:84:1: warning: 'tda10071_rd_regs' uses dynamic stack allocation [enabled by default] Instead, let's enforce a limit for the buffer. Considering that I2C transfers are generally limited, and that devices used on USB has a max data length of 64 bytes for the control URBs. So, it seem safe to use 64 bytes as the hard limit for all those devices. On most cases, the limit is a way lower than that, but this limit is small enough to not affect the Kernel stack, and it is a no brain limit, as using smaller ones would require to either carefully each driver or to take a look on each datasheet. Signed-off-by:
Antti Palosaari <crope@iki.fi> Signed-off-by:
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Mauro Carvalho Chehab authored
commit ba474642 upstream. Dynamic static allocation is evil, as Kernel stack is too low, and compilation complains about it on some archs: drivers/media/dvb-frontends/stb0899_drv.c:540:1: warning: 'stb0899_write_regs' uses dynamic stack allocation [enabled by default] Instead, let's enforce a limit for the buffer. Considering that I2C transfers are generally limited, and that devices used on USB has a max data length of 64 bytes for the control URBs. So, it seem safe to use 64 bytes as the hard limit for all those devices. On most cases, the limit is a way lower than that, but this limit is small enough to not affect the Kernel stack, and it is a no brain limit, as using smaller ones would require to either carefully each driver or to take a look on each datasheet. Signed-off-by:
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Mauro Carvalho Chehab authored
commit 9aca4fb0 upstream. Dynamic static allocation is evil, as Kernel stack is too low, and compilation complains about it on some archs: drivers/media/dvb-frontends/stv0367.c:791:1: warning: 'stv0367_writeregs.constprop.4' uses dynamic stack allocation [enabled by default] Instead, let's enforce a limit for the buffer. Considering that I2C transfers are generally limited, and that devices used on USB has a max data length of 64 bytes for the control URBs. So, it seem safe to use 64 bytes as the hard limit for all those devices. On most cases, the limit is a way lower than that, but this limit is small enough to not affect the Kernel stack, and it is a no brain limit, as using smaller ones would require to either carefully each driver or to take a look on each datasheet. Signed-off-by:
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Mauro Carvalho Chehab authored
commit f7a35df1 upstream. Dynamic static allocation is evil, as Kernel stack is too low, and compilation complains about it on some archs: drivers/media/dvb-frontends/stv090x.c:750:1: warning: 'stv090x_write_regs.constprop.6' uses dynamic stack allocation [enabled by default] Instead, let's enforce a limit for the buffer. Considering that I2C transfers are generally limited, and that devices used on USB has a max data length of 64 bytes for the control URBs. So, it seem safe to use 64 bytes as the hard limit for all those devices. On most cases, the limit is a way lower than that, but this limit is small enough to not affect the Kernel stack, and it is a no brain limit, as using smaller ones would require to either carefully each driver or to take a look on each datasheet. Signed-off-by:
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Mauro Carvalho Chehab authored
commit f1baab87 upstream. Dynamic static allocation is evil, as Kernel stack is too low, and compilation complains about it on some archs: drivers/media/tuners/e4000.c:50:1: warning: 'e4000_wr_regs' uses dynamic stack allocation [enabled by default] drivers/media/tuners/e4000.c:83:1: warning: 'e4000_rd_regs' uses dynamic stack allocation [enabled by default] drivers/media/tuners/fc2580.c:66:1: warning: 'fc2580_wr_regs.constprop.1' uses dynamic stack allocation [enabled by default] drivers/media/tuners/fc2580.c:98:1: warning: 'fc2580_rd_regs.constprop.0' uses dynamic stack allocation [enabled by default] drivers/media/tuners/tda18212.c:57:1: warning: 'tda18212_wr_regs' uses dynamic stack allocation [enabled by default] drivers/media/tuners/tda18212.c:90:1: warning: 'tda18212_rd_regs.constprop.0' uses dynamic stack allocation [enabled by default] drivers/media/tuners/tda18218.c:60:1: warning: 'tda18218_wr_regs' uses dynamic stack allocation [enabled by default] drivers/media/tuners/tda18218.c:92:1: warning: 'tda18218_rd_regs.constprop.0' uses dynamic stack allocation [enabled by default] Instead, let's enforce a limit for the buffer. Considering that I2C transfers are generally limited, and that devices used on USB has a max data length of 64 bytes for the control URBs. So, it seem safe to use 64 bytes as the hard limit for all those devices. On most cases, the limit is a way lower than that, but this limit is small enough to not affect the Kernel stack, and it is a no brain limit, as using smaller ones would require to either carefully each driver or to take a look on each datasheet. Signed-off-by:
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Mauro Carvalho Chehab authored
commit 56ac0337 upstream. Dynamic static allocation is evil, as Kernel stack is too low, and compilation complains about it on some archs: drivers/media/tuners/tuner-xc2028.c:651:1: warning: 'load_firmware' uses dynamic stack allocation [enabled by default] Instead, let's enforce a limit for the buffer. In the specific case of this driver, the maximum limit is 80, used only on tm6000 driver. This limit is due to the size of the USB control URBs. Ok, it would be theoretically possible to use a bigger size on PCI devices, but the firmware load time is already good enough. Anyway, if some usage requires more, it is just a matter of also increasing the buffer size at load_firmware(). Signed-off-by:
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Mauro Carvalho Chehab authored
commit ac5b4b6b upstream. Dynamic static allocation is evil, as Kernel stack is too low, and ompilation complains about it on some archs: drivers/staging/media/lirc/lirc_zilog.c:967:1: warning: 'read' uses dynamic stack allocation [enabled by default] Instead, let's enforce a limit for the buffer to be 64. That should be more than enough. Signed-off-by:
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Mauro Carvalho Chehab authored
commit 1d212cf0 upstream. drivers/media/pci/cx18/cx18-driver.c: In function 'cx18_read_eeprom': drivers/media/pci/cx18/cx18-driver.c:357:1: warning: the frame size of 1072 bytes is larger than 1024 bytes [-Wframe-larger-than=] That happens because the routine allocates 256 bytes for an eeprom buffer, plus the size of struct i2c_client, with is big. Change the logic to dynamically allocate/deallocate space for struct i2c_client, instead of using the stack. Signed-off-by:
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Mauro Carvalho Chehab authored
commit 278ba83a upstream. Dynamic static allocation is evil, as Kernel stack is too low, and compilation complains about it on some archs: drivers/media/pci/cx23885/cimax2.c:149:1: warning: 'netup_write_i2c' uses dynamic stack allocation [enabled by default] Instead, let's enforce a limit for the buffer. Considering that I2C transfers are generally limited, and that devices used on USB has a max data length of 64 bytes for the control URBs. So, it seem safe to use 64 bytes as the hard limit for all those devices. On most cases, the limit is a way lower than that, but this limit is small enough to not affect the Kernel stack, and it is a no brain limit, as using smaller ones would require to either carefully each driver or to take a look on each datasheet. Signed-off-by:
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Mauro Carvalho Chehab authored
commit 5bf30b3b upstream. Dynamic static allocation is evil, as Kernel stack is too low, and compilation complains about it on some archs: drivers/media/pci/ttpci/av7110_hw.c:510:1: warning: 'av7110_fw_cmd' uses dynamic stack allocation [enabled by default] Instead, let's enforce a limit for the buffer. In the specific case of this driver, the maximum fw command size is 6 + 2, as checked using: $ git grep -A1 av7110_fw_cmd drivers/media/pci/ttpci/ So, use 8 for the buffer size. Signed-off-by:
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Mauro Carvalho Chehab authored
commit 64f7ef8a upstream. Dynamic static allocation is evil, as Kernel stack is too low, and compilation complains about it on some archs: drivers/media/usb/dvb-usb/cxusb.c:209:1: warning: 'cxusb_i2c_xfer' uses dynamic stack allocation [enabled by default] drivers/media/usb/dvb-usb/cxusb.c:69:1: warning: 'cxusb_ctrl_msg' uses dynamic stack allocation [enabled by default] Instead, let's enforce a limit for the buffer to be the max size of a control URB payload data (64 bytes). Signed-off-by:
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