* [PATCH] scsi: qla2xxx: Simplify conditional check
@ 2018-09-21 0:27 Nathan Chancellor
2018-10-16 22:27 ` Martin K. Petersen
0 siblings, 1 reply; 4+ messages in thread
From: Nathan Chancellor @ 2018-09-21 0:27 UTC (permalink / raw)
To: qla2xxx-upstream, James E.J. Bottomley, Martin K. Petersen
Cc: linux-scsi, linux-kernel, Nathan Chancellor
Clang generates a warning when it sees a logical not followed by a
conditional operator like ==, >, or < because it thinks that the logical
not should be applied to the whole statement:
drivers/scsi/qla2xxx/qla_nx.c:3702:7: warning: logical not is only
applied to the left hand side of this comparison
[-Wlogical-not-parentheses]
if (!qla2x00_eh_wait_for_pending_commands(vha, 0, 0,
^
drivers/scsi/qla2xxx/qla_nx.c:3702:7: note: add parentheses after the
'!' to evaluate the comparison first
if (!qla2x00_eh_wait_for_pending_commands(vha, 0, 0,
^
(
drivers/scsi/qla2xxx/qla_nx.c:3702:7: note: add parentheses around left
hand side expression to silence this warning
if (!qla2x00_eh_wait_for_pending_commands(vha, 0, 0,
^
(
1 warning generated.
It assumes the author might have made a mistake in their logic:
if (!a == b) -> if (!(a == b))
Sometimes that is the case; other times, it's just a super convoluted
way of saying 'if (a)' when b = 0:
if (!1 == 0) -> if (0 == 0) -> if (true)
Alternatively:
if (!1 == 0) -> if (!!1) -> if (1)
Simplify this comparison so that Clang doesn't complain.
Link: https://github.com/ClangBuiltLinux/linux/issues/80
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
---
drivers/scsi/qla2xxx/qla_nx.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/scsi/qla2xxx/qla_nx.c b/drivers/scsi/qla2xxx/qla_nx.c
index de2bc78449e7..121e18b3b9f8 100644
--- a/drivers/scsi/qla2xxx/qla_nx.c
+++ b/drivers/scsi/qla2xxx/qla_nx.c
@@ -3699,8 +3699,8 @@ qla82xx_chip_reset_cleanup(scsi_qla_host_t *vha)
spin_unlock_irqrestore(&ha->hardware_lock, flags);
/* Wait for pending cmds (physical and virtual) to complete */
- if (!qla2x00_eh_wait_for_pending_commands(vha, 0, 0,
- WAIT_HOST) == QLA_SUCCESS) {
+ if (qla2x00_eh_wait_for_pending_commands(vha, 0, 0,
+ WAIT_HOST)) {
ql_dbg(ql_dbg_init, vha, 0x00b3,
"Done wait for "
"pending commands.\n");
--
2.19.0
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH] scsi: qla2xxx: Simplify conditional check
2018-09-21 0:27 [PATCH] scsi: qla2xxx: Simplify conditional check Nathan Chancellor
@ 2018-10-16 22:27 ` Martin K. Petersen
0 siblings, 0 replies; 4+ messages in thread
From: Martin K. Petersen @ 2018-10-16 22:27 UTC (permalink / raw)
To: Nathan Chancellor
Cc: qla2xxx-upstream, James E.J. Bottomley, Martin K. Petersen,
linux-scsi, linux-kernel
Nathan,
> Clang generates a warning when it sees a logical not followed by a
> conditional operator like ==, >, or < because it thinks that the logical
> not should be applied to the whole statement:
> Link: https://github.com/ClangBuiltLinux/linux/issues/80
> Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Applied to 4.20/scsi-queue.
--
Martin K. Petersen Oracle Linux Engineering
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] scsi: qla2xxx: Simplify conditional check
2019-03-20 16:33 Nathan Chancellor
@ 2019-03-20 17:08 ` Nick Desaulniers
0 siblings, 0 replies; 4+ messages in thread
From: Nick Desaulniers @ 2019-03-20 17:08 UTC (permalink / raw)
To: Nathan Chancellor
Cc: qla2xxx-upstream, James E.J. Bottomley, Martin K. Petersen,
linux-scsi, LKML, clang-built-linux
On Wed, Mar 20, 2019 at 9:36 AM Nathan Chancellor
<natechancellor@gmail.com> wrote:
>
> Clang generates a warning when it sees a logical not followed by a
> conditional operator like ==, >, or < because it thinks that the logical
> not should be applied to the whole statement:
>
> drivers/scsi/qla2xxx/qla_nx.c:3702:7: warning: logical not is only
> applied to the left hand side of this comparison
> [-Wlogical-not-parentheses]
> if (!qla2x00_eh_wait_for_pending_commands(vha, 0, 0,
> ^
> drivers/scsi/qla2xxx/qla_nx.c:3702:7: note: add parentheses after the
> '!' to evaluate the comparison first
> if (!qla2x00_eh_wait_for_pending_commands(vha, 0, 0,
> ^
> (
> drivers/scsi/qla2xxx/qla_nx.c:3702:7: note: add parentheses around left
> hand side expression to silence this warning
> if (!qla2x00_eh_wait_for_pending_commands(vha, 0, 0,
> ^
> (
> 1 warning generated.
>
> It assumes the author might have made a mistake in their logic:
>
> if (!a == b) -> if (!(a == b))
>
> Sometimes that is the case; other times, it's just a super convoluted
> way of saying 'if (a)' when b = 0:
>
> if (!1 == 0) -> if (0 == 0) -> if (true)
>
> Alternatively:
>
> if (!1 == 0) -> if (!!1) -> if (1)
>
> Simplify this comparison so that Clang doesn't complain.
>
> Link: https://github.com/ClangBuiltLinux/linux/issues/80
> Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
> ---
>
> This is commit 0bfe7d3cae58 ("scsi: qla2xxx: Simplify conditional check")
> upstream but commit 3695310e37b4 ("scsi: qla2xxx: Update flash
> read/write routine") in the 5.2/scsi-queue branch silently reverted it.
> I don't care if it is squashed or not, I just want the warning to stay
> fixed.
This is probably a simpler commit message. A "Fixes:" tag is a simple
enough addition, too.
Thanks for catching this and resending the fix.
>
> Thanks,
> Nathan
>
> drivers/scsi/qla2xxx/qla_nx.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/scsi/qla2xxx/qla_nx.c b/drivers/scsi/qla2xxx/qla_nx.c
> index de2bc78449e7..121e18b3b9f8 100644
> --- a/drivers/scsi/qla2xxx/qla_nx.c
> +++ b/drivers/scsi/qla2xxx/qla_nx.c
> @@ -3699,8 +3699,8 @@ qla82xx_chip_reset_cleanup(scsi_qla_host_t *vha)
> spin_unlock_irqrestore(&ha->hardware_lock, flags);
>
> /* Wait for pending cmds (physical and virtual) to complete */
> - if (!qla2x00_eh_wait_for_pending_commands(vha, 0, 0,
> - WAIT_HOST) == QLA_SUCCESS) {
> + if (qla2x00_eh_wait_for_pending_commands(vha, 0, 0,
> + WAIT_HOST)) {
> ql_dbg(ql_dbg_init, vha, 0x00b3,
> "Done wait for "
> "pending commands.\n");
> --
> 2.21.0
>
> --
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--
Thanks,
~Nick Desaulniers
^ permalink raw reply [flat|nested] 4+ messages in thread
* [PATCH] scsi: qla2xxx: Simplify conditional check
@ 2019-03-20 16:33 Nathan Chancellor
2019-03-20 17:08 ` Nick Desaulniers
0 siblings, 1 reply; 4+ messages in thread
From: Nathan Chancellor @ 2019-03-20 16:33 UTC (permalink / raw)
To: qla2xxx-upstream, James E.J. Bottomley, Martin K. Petersen
Cc: linux-scsi, linux-kernel, clang-built-linux, Nathan Chancellor
Clang generates a warning when it sees a logical not followed by a
conditional operator like ==, >, or < because it thinks that the logical
not should be applied to the whole statement:
drivers/scsi/qla2xxx/qla_nx.c:3702:7: warning: logical not is only
applied to the left hand side of this comparison
[-Wlogical-not-parentheses]
if (!qla2x00_eh_wait_for_pending_commands(vha, 0, 0,
^
drivers/scsi/qla2xxx/qla_nx.c:3702:7: note: add parentheses after the
'!' to evaluate the comparison first
if (!qla2x00_eh_wait_for_pending_commands(vha, 0, 0,
^
(
drivers/scsi/qla2xxx/qla_nx.c:3702:7: note: add parentheses around left
hand side expression to silence this warning
if (!qla2x00_eh_wait_for_pending_commands(vha, 0, 0,
^
(
1 warning generated.
It assumes the author might have made a mistake in their logic:
if (!a == b) -> if (!(a == b))
Sometimes that is the case; other times, it's just a super convoluted
way of saying 'if (a)' when b = 0:
if (!1 == 0) -> if (0 == 0) -> if (true)
Alternatively:
if (!1 == 0) -> if (!!1) -> if (1)
Simplify this comparison so that Clang doesn't complain.
Link: https://github.com/ClangBuiltLinux/linux/issues/80
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
---
This is commit 0bfe7d3cae58 ("scsi: qla2xxx: Simplify conditional check")
upstream but commit 3695310e37b4 ("scsi: qla2xxx: Update flash
read/write routine") in the 5.2/scsi-queue branch silently reverted it.
I don't care if it is squashed or not, I just want the warning to stay
fixed.
Thanks,
Nathan
drivers/scsi/qla2xxx/qla_nx.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/scsi/qla2xxx/qla_nx.c b/drivers/scsi/qla2xxx/qla_nx.c
index de2bc78449e7..121e18b3b9f8 100644
--- a/drivers/scsi/qla2xxx/qla_nx.c
+++ b/drivers/scsi/qla2xxx/qla_nx.c
@@ -3699,8 +3699,8 @@ qla82xx_chip_reset_cleanup(scsi_qla_host_t *vha)
spin_unlock_irqrestore(&ha->hardware_lock, flags);
/* Wait for pending cmds (physical and virtual) to complete */
- if (!qla2x00_eh_wait_for_pending_commands(vha, 0, 0,
- WAIT_HOST) == QLA_SUCCESS) {
+ if (qla2x00_eh_wait_for_pending_commands(vha, 0, 0,
+ WAIT_HOST)) {
ql_dbg(ql_dbg_init, vha, 0x00b3,
"Done wait for "
"pending commands.\n");
--
2.21.0
^ permalink raw reply related [flat|nested] 4+ messages in thread
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2018-09-21 0:27 [PATCH] scsi: qla2xxx: Simplify conditional check Nathan Chancellor
2018-10-16 22:27 ` Martin K. Petersen
2019-03-20 16:33 Nathan Chancellor
2019-03-20 17:08 ` Nick Desaulniers
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