- 08 Apr, 2013 13 commits
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Arend van Spriel authored
Firmware can signal whether the host driver may sent packets for a specific destination or interface. This can happen when a destination is sleeping or when going off-channel. Reviewed-by:
Pieter-Paul Giesberts <pieterpg@broadcom.com> Reviewed-by:
Hante Meuleman <meuleman@broadcom.com> Signed-off-by:
Arend van Spriel <arend@broadcom.com> Signed-off-by:
John W. Linville <linville@tuxdriver.com>
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Arend van Spriel authored
reported by Hante. Needs to be squashed in commit 187fbcec. Reviewed-by:
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Andreas Fenkart authored
Not locking ra_list when dequeuing packets creates race conditions. When adding a packet 'tx_pkts_queued' is modified before setting highest_priority_queue. If in-between the main loop starts, it will see a packet queued (tx_pkts_queued > 0) but will not find it, since max prio is not set yet. Depending on the scheduling, the thread trying to add the packet could complete and restore the situation. But this is not something to rely on. Another race condition exists, if a new packet, exceeding current max prio is added. If concurrently a packet is dequeued, the newly set max prio will be overwritten with the value of the dequeued packet. This can occur, because selecting a packet and modifying the max prio is not atomic. The result in an infinite loop unless, a new packet is added that has at least the priority of the hidden packet. Same applies to bss_prio_tbl. Forward iteration is no proper lock-free technique and provides no protection from calls to list_del. Although BSS are currently not added/removed dynamically, this must not be the case in the future. Hence always hold proper locks when accessing those lists. Signed-off-by:
Andreas Fenkart <andreas.fenkart@streamunlimited.com> Signed-off-by:
Bing Zhao <bzhao@marvell.com> Signed-off-by:
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Andreas Fenkart authored
Using NO_PKT_PRIO_TID and tx_pkts_queued to check for an empty state, can lead to a contradictory state, resulting in an infinite loop. Currently queueing and dequeuing of packets is not synchronized, and can happen concurrently. While tx_pkts_queued is incremented when adding a packet, max prio is set to NO_PKT when the WMM list is empty. If a packet is added right after the check for empty, but before setting max prio to NO_PKT, that packet is trapped and creates an infinite loop. Because of the new packet, tx_pkts_queued is at least 1, indicating wmm lists are not empty. Opposing that max prio is NO_PKT, which means "skip this wmm queue, it has no packets". The infinite loop results, because the main loop checks the wmm lists for not empty via tx_pkts_queued, but for dequeing it uses max_prio to see if it can skip current list. This will never end, unless a new packet is added which will restore max prio to the level of the trapped packet. The solution here is to rely on tx_pkts_queued solely for checking wmm queue to be empty, and drop the NO_PKT define. It does not address the locking issue. Signed-off-by:
Avinash Patil <patila@marvell.com> Signed-off-by:
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Andreas Fenkart authored
ra_list_spinlock is used to protect struct mwifiex_wmm_desc and embedded structures such as ra_list. tid_tbl_lock while more fine grained, is not used but in one function. That function is not called reentrantly. To protect ra_list from concurrent modification ra_list_spinlock must be held. Signed-off-by:
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Andreas Fenkart authored
adapter->bss_prio_tbl list has already been checked in outer loop. The inner loop works with priv_tmp->wmm.tid_tbl_ptr list. Also the lock taken, gives hint that this is likely a copy-paste error. Signed-off-by:
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Larry Finger authored
An allyesconfig build of rtl8188ee yields the following duplicate entry points: drivers/net/wireless/rtlwifi/rtl8188ee/built-in.o: In function `.rtl92c_phy_ap_calibrate': (.text+0x21d14): multiple definition of `.rtl92c_phy_ap_calibrate' drivers/net/wireless/rtlwifi/rtl8192c/built-in.o:(.text+0xb1e8): first defined here drivers/net/wireless/rtlwifi/rtl8188ee/built-in.o: In function `rtl_hal_pwrseqcmdparsing': (.opd+0xed0): multiple definition of `rtl_hal_pwrseqcmdparsing' One of the routines is not used and can be deleted, the other is renamed. Signed-off-by:
Larry Finger <Larry.Finger@lwfinger.net> Reported-by:
Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by:
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Larry Finger authored
Building rtl8188ee yields warnings such as the following: x86_64-linux-gcc: warning: drivers/net/wireless/rtlwifi: linker input file unused because linking not done The only potential cause is an extraneous space in the make file. Signed-off-by:
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Zefir Kurtisi authored
These are the remaining knobs in ath9k to support DFS: * mark AR9280 and AR9580 as DFS tested * synchronize DFS regulatory domain to reg notifyer * set required RX filter flags for radar detection * process radar PHY errors at DFS detector * notify DFS master on radar detection DFS support requires CONFIG_ATH9K_DFS_CERTIFIED to be set. Signed-off-by:
Zefir Kurtisi <zefir.kurtisi@neratec.com> Signed-off-by:
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Zefir Kurtisi authored
This helps testing DFS without radar generating equipment and is required for certification. Signed-off-by:
Simon Wunderlich <siwu@hrz.tu-chemnitz.de> Signed-off-by:
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Zefir Kurtisi authored
Signed-off-by:
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Ben Greear authored
Should make the warning messages more useful. Signed-off-by:
Ben Greear <greearb@candelatech.com> Signed-off-by:
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Bing Zhao authored
cmd_pending is increased in mwifiex_wait_queue_complete() and decreased in mwifiex_complete_cmd() currently. If there are two or more commands in the cmd_pending_q the main worker thread will pick up next command from cmd_pending_q automatically after finishing current command. As a result mwifiex_wait_queue_complete() will not be called because the command is alreay completed. This leads to a negative number in cmd_pending count. Fix it by increasing cmd_pending when a cmd is queued into cmd_pending_q and decreasing when that cmd is recycled. For scan commands we don't perform inc/dec operations until it's moved from scan_pending_q to cmd_pending_q. This covers both synchronous and asynchronous commands. Reported-by:
Daniel Drake <dsd@laptop.org> Tested-by:
Marco Cesarano <marco@marvell.com> Signed-off-by:
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- 03 Apr, 2013 27 commits
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Arend van Spriel authored
Firmware provides the driver with credits used to transmit packets to the firmware. When credits run out the packets should be queued and dequeued when receiving creditback signals from the firmware. Reviewed-by:
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Arend van Spriel authored
The fcmode provided by module parameter defaults to NONE, which means no flow-control is required. In this case flow-control signals should not be enabled. Reviewed-by:
Piotr Haber <phaber@broadcom.com> Reviewed-by:
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Arend van Spriel authored
Bail out of brcmf_fws_init() when no firmware-signalling is asked for. Need to take this into account in brcmf_fws_deinit() as well. Reviewed-by:
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Arend van Spriel authored
The functions are moved in preparation of later patches. Reviewed-by:
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Arend van Spriel authored
The length is not according specification so better fix it. Reviewed-by:
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Arend van Spriel authored
If iovar to the firmware fails the firmware-signalling module does a cleanup for which it needs pointer to struct brcmf_pub, which it gets from struct brcmf_fws_info::drvr. Assign this field before doing the tlv iovar. Reviewed-by:
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Arend van Spriel authored
The low-level sdio code has a large number of trace and info messages that are mostly useful looking into bus specific issues. For tracing higher-level driver functions it is better to have a dedicated level for low-level sdio debugging. Reviewed-by:
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Piotr Haber authored
During SDIO layer flow control signalling firmware can issue invalid packets. Prevent printing of parsing errors in such case. Reviewed-by:
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Arend van Spriel authored
Parsing the tlv upon receiving frames can fail. Instead of printing an error message, just count the parse failure. On some devices we receive a lot of invalid tlv signals. this commit will be squashed. Signed-off-by:
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Arend van Spriel authored
When firmware-signalling is active the brcmf_txcomplete() does a free of the sk_buff when transfer to firmware fails in the bus-specific driver code. However, it should also cleanup the packet from the hanger. This patch fixes that. Reviewed-by:
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Arend van Spriel authored
Enabling the tx status signalling, which requires packet tagging before sending to the firmware and handling the tx status signal. Reviewed-by:
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Arend van Spriel authored
Upcoming patches will add firmware signalled flow control. Prepare by adding the mode, which defaults to disable it. The mode can be queried by brcmf_fws_fc_active() and set by a module parameter. Reviewed-by:
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Arend van Spriel authored
Add a callback to obtain packet queue from the bus-specific code used to cleanup packet buffers from firmware-signalling code. Reviewed-by:
Franky (Zhenhui) Lin <frankyl@broadcom.com> Signed-off-by:
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Arend van Spriel authored
The hanger for firmware-signalling is used to retain information for outstanding transmit packets that await tx status. Reviewed-by:
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Arend van Spriel authored
When an interface is deleted make sure to cleanup all packet buffers related to that interface. Reviewed-by:
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Arend van Spriel authored
The sk_buff structure contains a control buffer that can be used by different layers in the networking stack for holding packet associated information. In brcmfmac it is used to hold firmware signalling related information. Reviewed-by:
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Arend van Spriel authored
Currently, the netif queue is only stopped when the bus interface is giving a push back. This will change soon so prepare the driver by adding a stop reason and stop/resume the queue accordingly. Reviewed-by:
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Arend van Spriel authored
Add a cleanup function releasing any queued packet buffers in the mac descriptor entries. Reviewed-by:
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Arend van Spriel authored
The firmware signalling functionality needs the credit map firmware events. This patch adds registration of a handler for this event. Reviewed-by:
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Arend van Spriel authored
Firmware can signal the driver to allocate descriptor info for a given mac address, which will be used for flow control and host queueing. Reviewed-by:
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Arend van Spriel authored
Firmware signalling needs to handle resources upon interface events. This patch add calls in the interface event handling routine. Reviewed-by:
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Hante Meuleman authored
Use information from the device to determine the bands property of the wiphy object. After this change the support of 80211n is correctly presented in the bands property. Reviewed-by:
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Arend van Spriel authored
In brcmf_sdbrcm_txpkt() a new packet is allocated and used to transmit to firmware freeing up the original packet. However, that packet is still referenced in firmware-signalling so this would result in a double free. Using skb_cow() avoids this as the packet reference is unchanged. Reviewed-by:
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Arend van Spriel authored
When taking care of packet alignment to 64-byte boundary padding may be added between SDPCM header and CDC data. It clear both SDPCM header space and padding space. Changed it to only clear padding space. In filling the SDPCM header it uses unaligned access to set SDPCM software header, but preceding code assures it is properly aligned. Signed-off-by:
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Arend van Spriel authored
The function brcmf_sdbrcm_txpkt() calls brcmf_txcomplete() with a parameter success. For this parameter it passes ret != 0, but that condition is true upon failure. Reviewed-by:
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Chen, Chien-Chia authored
This patch is to fix some wrong header file path. It has caused the build failed. Signed-off-by:
Chen, Chien-Chia <machen@suse.com> Cc: larry.finger@lwfinger.net Cc: zhiyuan_yang@realsil.com.cn Cc: page_he@realsil.com.cn Cc: mmarek@suse.cz Signed-off-by:
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Samuel Ortiz authored
This reverts commit 63cd353c. We no longer need this fix as the MEI bus APIs are now merged into char-misc-next. Signed-off-by:
Samuel Ortiz <sameo@linux.intel.com> Signed-off-by:
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