Commit-ID: 8eed9833346781dd15e3bef35a91b0a40787ea3c
Gitweb: http://git.kernel.org/tip/8eed9833346781dd15e3bef35a91b0a40787ea3c
Author: Joerg Roedel <joerg.roedel@xxxxxxx>
AuthorDate: Thu, 26 Nov 2009 15:45:41 +0100
Committer: Joerg Roedel <joerg.roedel@xxxxxxx>
CommitDate: Fri, 27 Nov 2009 14:20:37 +0100
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@xxxxxxx>
---
arch/x86/kernel/amd_iommu.c | 13 ++++++-------
1 files changed, 6 insertions(+), 7 deletions(-)
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index 0eafca5..b75fcd9 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -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();
--
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