diff mbox

[v6,16/37] cxlflash: Fix async interrupt bypass logic

Message ID 1445458425-20567-1-git-send-email-mrochs@linux.vnet.ibm.com (mailing list archive)
State Accepted, archived
Headers show

Commit Message

Matthew R. Ochs Oct. 21, 2015, 8:13 p.m. UTC 
A bug was introduced earlier in the development cycle when cleaning
up logic statements. Instead of skipping bits that are not set, set
bits are skipped, causing async interrupts to not be handled correctly.

To fix, simply add back in the proper evaluation for an unset bit.

Signed-off-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>
Signed-off-by: Manoj N. Kumar <manoj@linux.vnet.ibm.com>
Reviewed-by: Brian King <brking@linux.vnet.ibm.com>
---
 drivers/scsi/cxlflash/main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Andrew Donnellan Oct. 23, 2015, 3:40 a.m. UTC | #1 
On 22/10/15 07:13, Matthew R. Ochs wrote:
> A bug was introduced earlier in the development cycle when cleaning
> up logic statements. Instead of skipping bits that are not set, set
> bits are skipped, causing async interrupts to not be handled correctly.
>
> To fix, simply add back in the proper evaluation for an unset bit.
>
> Signed-off-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>
> Signed-off-by: Manoj N. Kumar <manoj@linux.vnet.ibm.com>
> Reviewed-by: Brian King <brking@linux.vnet.ibm.com>

Reviewed-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
Tomas Henzl Oct. 23, 2015, 1:39 p.m. UTC | #2 
On 21.10.2015 22:13, Matthew R. Ochs wrote:
> A bug was introduced earlier in the development cycle when cleaning
> up logic statements. Instead of skipping bits that are not set, set
> bits are skipped, causing async interrupts to not be handled correctly.
>
> To fix, simply add back in the proper evaluation for an unset bit.
>
> Signed-off-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>
> Signed-off-by: Manoj N. Kumar <manoj@linux.vnet.ibm.com>
> Reviewed-by: Brian King <brking@linux.vnet.ibm.com>

Reviewed-by: Tomas Henzl <thenzl@redhat.com>

Tomas

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diff mbox

Patch

diff --git a/drivers/scsi/cxlflash/main.c b/drivers/scsi/cxlflash/main.c
index 98fdac1..ed9fd8c 100644
--- a/drivers/scsi/cxlflash/main.c
+++ b/drivers/scsi/cxlflash/main.c
@@ -1315,7 +1315,7 @@  static irqreturn_t cxlflash_async_err_irq(int irq, void *data)
 	/* check each bit that is on */
 	for (i = 0; reg_unmasked; i++, reg_unmasked = (reg_unmasked >> 1)) {
 		info = find_ainfo(1ULL << i);
-		if ((reg_unmasked & 0x1) || !info)
+		if (((reg_unmasked & 0x1) == 0) || !info)
 			continue;
 
 		port = info->port;