UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

x86/amd-iommu: Move reset_iommu_command_buffer out of locked code 

This patch removes the ugly contruct where the
iommu->lock must be released while before calling the
reset_iommu_command_buffer function.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Joerg Roedel 2009-11-26 15:45:41 +01:00
parent b00d3bcff4
commit 8eed983334
1 changed files with 6 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
arch/x86/kernel/amd_iommu.c
View File

@ -285,6 +285,7 @@ static void iommu_print_event(struct amd_iommu *iommu, void *__evt)
break;
case EVENT_TYPE_ILL_CMD:
printk("ILLEGAL_COMMAND_ERROR address=0x%016llx]\n", address);
iommu->reset_in_progress = true;
reset_iommu_command_buffer(iommu);
dump_command(address);
break;
@ -407,11 +408,8 @@ static void __iommu_wait_for_completion(struct amd_iommu *iommu)
status &= ~MMIO_STATUS_COM_WAIT_INT_MASK;
writel(status, iommu->mmio_base + MMIO_STATUS_OFFSET);
if (unlikely(i == EXIT_LOOP_COUNT)) {
spin_unlock(&iommu->lock);
reset_iommu_command_buffer(iommu);
spin_lock(&iommu->lock);
}
if (unlikely(i == EXIT_LOOP_COUNT))
iommu->reset_in_progress = true;
}
/*
@ -458,6 +456,9 @@ static int iommu_completion_wait(struct amd_iommu *iommu)
out:
spin_unlock_irqrestore(&iommu->lock, flags);
if (iommu->reset_in_progress)
reset_iommu_command_buffer(iommu);
return 0;
}
@ -649,8 +650,6 @@ static void reset_iommu_command_buffer(struct amd_iommu *iommu)
if (iommu->reset_in_progress)
panic("AMD-Vi: ILLEGAL_COMMAND_ERROR while resetting command buffer\n");
iommu->reset_in_progress = true;
amd_iommu_reset_cmd_buffer(iommu);
amd_iommu_flush_all_devices();
amd_iommu_flush_all_domains();