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Commit 1079a2d2 authored by Zachary Amsden's avatar Zachary Amsden Committed by James Bottomley
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[SCSI] BusLogic: stop using check_region 

I got so sick of seing the check_region warnings from BusLogic.c I actually
fixed it properly.  Never use check region, reserve it before the probe
with request region instead and check the error result; free region if
setup fails.  Should be functionally identical to the original except for
fixing the potential race.
Signed-off-by: default avatarZachary Amsden <zach@vmware.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarJames Bottomley <James.Bottomley@SteelEye.com>
parent ad1331a7
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Showing with 48 additions and 25 deletions
drivers/scsi/BusLogic.c
View file @ 1079a2d2
......@@ -579,17 +579,17 @@ static void __init BusLogic_InitializeProbeInfoListISA(struct BusLogic_HostAdapt
/*
Append the list of standard BusLogic MultiMaster ISA I/O Addresses.
*/
if (BusLogic_ProbeOptions.LimitedProbeISA ? BusLogic_ProbeOptions.Probe330 : check_region(0x330, BusLogic_MultiMasterAddressCount) == 0)
if (!BusLogic_ProbeOptions.LimitedProbeISA || BusLogic_ProbeOptions.Probe330)
BusLogic_AppendProbeAddressISA(0x330);
if (BusLogic_ProbeOptions.LimitedProbeISA ? BusLogic_ProbeOptions.Probe334 : check_region(0x334, BusLogic_MultiMasterAddressCount) == 0)
if (!BusLogic_ProbeOptions.LimitedProbeISA || BusLogic_ProbeOptions.Probe334)
BusLogic_AppendProbeAddressISA(0x334);
if (BusLogic_ProbeOptions.LimitedProbeISA ? BusLogic_ProbeOptions.Probe230 : check_region(0x230, BusLogic_MultiMasterAddressCount) == 0)
if (!BusLogic_ProbeOptions.LimitedProbeISA || BusLogic_ProbeOptions.Probe230)
BusLogic_AppendProbeAddressISA(0x230);
if (BusLogic_ProbeOptions.LimitedProbeISA ? BusLogic_ProbeOptions.Probe234 : check_region(0x234, BusLogic_MultiMasterAddressCount) == 0)
if (!BusLogic_ProbeOptions.LimitedProbeISA || BusLogic_ProbeOptions.Probe234)
BusLogic_AppendProbeAddressISA(0x234);
if (BusLogic_ProbeOptions.LimitedProbeISA ? BusLogic_ProbeOptions.Probe130 : check_region(0x130, BusLogic_MultiMasterAddressCount) == 0)
if (!BusLogic_ProbeOptions.LimitedProbeISA || BusLogic_ProbeOptions.Probe130)
BusLogic_AppendProbeAddressISA(0x130);
if (BusLogic_ProbeOptions.LimitedProbeISA ? BusLogic_ProbeOptions.Probe134 : check_region(0x134, BusLogic_MultiMasterAddressCount) == 0)
if (!BusLogic_ProbeOptions.LimitedProbeISA || BusLogic_ProbeOptions.Probe134)
BusLogic_AppendProbeAddressISA(0x134);
}
......@@ -795,7 +795,9 @@ static int __init BusLogic_InitializeMultiMasterProbeInfo(struct BusLogic_HostAd
host adapters are probed.
*/
if (!BusLogic_ProbeOptions.NoProbeISA)
if (PrimaryProbeInfo->IO_Address == 0 && (BusLogic_ProbeOptions.LimitedProbeISA ? BusLogic_ProbeOptions.Probe330 : check_region(0x330, BusLogic_MultiMasterAddressCount) == 0)) {
if (PrimaryProbeInfo->IO_Address == 0 &&
(!BusLogic_ProbeOptions.LimitedProbeISA ||
BusLogic_ProbeOptions.Probe330)) {
PrimaryProbeInfo->HostAdapterType = BusLogic_MultiMaster;
PrimaryProbeInfo->HostAdapterBusType = BusLogic_ISA_Bus;
PrimaryProbeInfo->IO_Address = 0x330;
......@@ -805,15 +807,25 @@ static int __init BusLogic_InitializeMultiMasterProbeInfo(struct BusLogic_HostAd
omitting the Primary I/O Address which has already been handled.
*/
if (!BusLogic_ProbeOptions.NoProbeISA) {
if (!StandardAddressSeen[1] && (BusLogic_ProbeOptions.LimitedProbeISA ? BusLogic_ProbeOptions.Probe334 : check_region(0x334, BusLogic_MultiMasterAddressCount) == 0))
if (!StandardAddressSeen[1] &&
(!BusLogic_ProbeOptions.LimitedProbeISA ||
BusLogic_ProbeOptions.Probe334))
BusLogic_AppendProbeAddressISA(0x334);
if (!StandardAddressSeen[2] && (BusLogic_ProbeOptions.LimitedProbeISA ? BusLogic_ProbeOptions.Probe230 : check_region(0x230, BusLogic_MultiMasterAddressCount) == 0))
if (!StandardAddressSeen[2] &&
(!BusLogic_ProbeOptions.LimitedProbeISA ||
BusLogic_ProbeOptions.Probe230))
BusLogic_AppendProbeAddressISA(0x230);
if (!StandardAddressSeen[3] && (BusLogic_ProbeOptions.LimitedProbeISA ? BusLogic_ProbeOptions.Probe234 : check_region(0x234, BusLogic_MultiMasterAddressCount) == 0))
if (!StandardAddressSeen[3] &&
(!BusLogic_ProbeOptions.LimitedProbeISA ||
BusLogic_ProbeOptions.Probe234))
BusLogic_AppendProbeAddressISA(0x234);
if (!StandardAddressSeen[4] && (BusLogic_ProbeOptions.LimitedProbeISA ? BusLogic_ProbeOptions.Probe130 : check_region(0x130, BusLogic_MultiMasterAddressCount) == 0))
if (!StandardAddressSeen[4] &&
(!BusLogic_ProbeOptions.LimitedProbeISA ||
BusLogic_ProbeOptions.Probe130))
BusLogic_AppendProbeAddressISA(0x130);
if (!StandardAddressSeen[5] && (BusLogic_ProbeOptions.LimitedProbeISA ? BusLogic_ProbeOptions.Probe134 : check_region(0x134, BusLogic_MultiMasterAddressCount) == 0))
if (!StandardAddressSeen[5] &&
(!BusLogic_ProbeOptions.LimitedProbeISA ||
BusLogic_ProbeOptions.Probe134))
BusLogic_AppendProbeAddressISA(0x134);
}
/*
......@@ -2220,22 +2232,35 @@ static int __init BusLogic_init(void)
HostAdapter->PCI_Device = ProbeInfo->PCI_Device;
HostAdapter->IRQ_Channel = ProbeInfo->IRQ_Channel;
HostAdapter->AddressCount = BusLogic_HostAdapterAddressCount[HostAdapter->HostAdapterType];
/*
Make sure region is free prior to probing.
*/
if (!request_region(HostAdapter->IO_Address, HostAdapter->AddressCount,
"BusLogic"))
continue;
/*
Probe the Host Adapter. If unsuccessful, abort further initialization.
*/
if (!BusLogic_ProbeHostAdapter(HostAdapter))
if (!BusLogic_ProbeHostAdapter(HostAdapter)) {
release_region(HostAdapter->IO_Address, HostAdapter->AddressCount);
continue;
}
/*
Hard Reset the Host Adapter. If unsuccessful, abort further
initialization.
*/
if (!BusLogic_HardwareResetHostAdapter(HostAdapter, true))
if (!BusLogic_HardwareResetHostAdapter(HostAdapter, true)) {
release_region(HostAdapter->IO_Address, HostAdapter->AddressCount);
continue;
}
/*
Check the Host Adapter. If unsuccessful, abort further initialization.
*/
if (!BusLogic_CheckHostAdapter(HostAdapter))
if (!BusLogic_CheckHostAdapter(HostAdapter)) {
release_region(HostAdapter->IO_Address, HostAdapter->AddressCount);
continue;
}
/*
Initialize the Driver Options field if provided.
*/
......@@ -2246,16 +2271,6 @@ static int __init BusLogic_init(void)
and Electronic Mail Address.
*/
BusLogic_AnnounceDriver(HostAdapter);
/*
Register usage of the I/O Address range. From this point onward, any
failure will be assumed to be due to a problem with the Host Adapter,
rather than due to having mistakenly identified this port as belonging
to a BusLogic Host Adapter. The I/O Address range will not be
released, thereby preventing it from being incorrectly identified as
any other type of Host Adapter.
*/
if (!request_region(HostAdapter->IO_Address, HostAdapter->AddressCount, "BusLogic"))
continue;
/*
Register the SCSI Host structure.
*/
......@@ -2280,6 +2295,12 @@ static int __init BusLogic_init(void)
Acquire the System Resources necessary to use the Host Adapter, then
Create the Initial CCBs, Initialize the Host Adapter, and finally
perform Target Device Inquiry.
From this point onward, any failure will be assumed to be due to a
problem with the Host Adapter, rather than due to having mistakenly
identified this port as belonging to a BusLogic Host Adapter. The
I/O Address range will not be released, thereby preventing it from
being incorrectly identified as any other type of Host Adapter.
*/
if (BusLogic_ReadHostAdapterConfiguration(HostAdapter) &&
BusLogic_ReportHostAdapterConfiguration(HostAdapter) &&
......@@ -3598,6 +3619,7 @@ static void __exit BusLogic_exit(void)
__setup("BusLogic=", BusLogic_Setup);
#ifdef MODULE
static struct pci_device_id BusLogic_pci_tbl[] __devinitdata = {
{ PCI_VENDOR_ID_BUSLOGIC, PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
......@@ -3607,6 +3629,7 @@ static struct pci_device_id BusLogic_pci_tbl[] __devinitdata = {
PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
{ }
};
#endif
MODULE_DEVICE_TABLE(pci, BusLogic_pci_tbl);
module_init(BusLogic_init);
......
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