All of lore.kernel.org
 help / color / mirror / Atom feed
From: Arnd Bergmann <arnd@arndb.de>
To: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Sakari Ailus <sakari.ailus@linux.intel.com>,
	linux-media@vger.kernel.org, devel@driverdev.osuosl.org,
	linux-kernel@vger.kernel.org, clang-built-linux@googlegroups.com,
	Arnd Bergmann <arnd@arndb.de>
Subject: [PATCH 1/9] staging: media: atomisp: fix incorrect NULL pointer check
Date: Fri, 29 May 2020 22:00:23 +0200	[thread overview]
Message-ID: <20200529200031.4117841-1-arnd@arndb.de> (raw)

Checking the pointer to a member of a struct against NULL
is pointless as clang points out:

drivers/staging/media/atomisp/pci/atomisp_cmd.c:4278:17: error: address of 'config->info' will always evaluate to 'true'

Check the original pointer instead, which may also be
unnecessary here, but makes a little more sense.

Fixes: 9d4fa1a16b28 ("media: atomisp: cleanup directory hierarchy")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/staging/media/atomisp/pci/atomisp_cmd.c | 2 +-
 drivers/staging/media/atomisp/pci/sh_css.c      | 4 ++--
 drivers/staging/media/atomisp/pci/sh_css_sp.c   | 4 ++--
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/staging/media/atomisp/pci/atomisp_cmd.c b/drivers/staging/media/atomisp/pci/atomisp_cmd.c
index 5be690f876c1..342fc3b34fe0 100644
--- a/drivers/staging/media/atomisp/pci/atomisp_cmd.c
+++ b/drivers/staging/media/atomisp/pci/atomisp_cmd.c
@@ -4275,7 +4275,7 @@ int atomisp_param(struct atomisp_sub_device *asd, int flag,
 		    atomisp_css_get_dvs_grid_info(
 			&asd->params.curr_grid_info);
 
-		if (!&config->info) {
+		if (!config) {
 			dev_err(isp->dev, "ERROR: NULL pointer in grid_info\n");
 			return -EINVAL;
 		}
diff --git a/drivers/staging/media/atomisp/pci/sh_css.c b/drivers/staging/media/atomisp/pci/sh_css.c
index d77432254a2c..e91c6029c651 100644
--- a/drivers/staging/media/atomisp/pci/sh_css.c
+++ b/drivers/staging/media/atomisp/pci/sh_css.c
@@ -8534,7 +8534,7 @@ ia_css_pipe_load_extension(struct ia_css_pipe *pipe,
 
 	if (firmware->info.isp.type == IA_CSS_ACC_OUTPUT)
 	{
-		if (&pipe->output_stage)
+		if (pipe)
 			append_firmware(&pipe->output_stage, firmware);
 		else {
 			IA_CSS_LEAVE_ERR_PRIVATE(IA_CSS_ERR_INTERNAL_ERROR);
@@ -8542,7 +8542,7 @@ ia_css_pipe_load_extension(struct ia_css_pipe *pipe,
 		}
 	} else if (firmware->info.isp.type == IA_CSS_ACC_VIEWFINDER)
 	{
-		if (&pipe->vf_stage)
+		if (pipe)
 			append_firmware(&pipe->vf_stage, firmware);
 		else {
 			IA_CSS_LEAVE_ERR_PRIVATE(IA_CSS_ERR_INTERNAL_ERROR);
diff --git a/drivers/staging/media/atomisp/pci/sh_css_sp.c b/drivers/staging/media/atomisp/pci/sh_css_sp.c
index e574396ad0f4..c0e579c1705f 100644
--- a/drivers/staging/media/atomisp/pci/sh_css_sp.c
+++ b/drivers/staging/media/atomisp/pci/sh_css_sp.c
@@ -1022,7 +1022,7 @@ sh_css_sp_init_stage(struct ia_css_binary *binary,
 		if (!pipe)
 			return IA_CSS_ERR_INTERNAL_ERROR;
 		ia_css_get_crop_offsets(pipe, &args->in_frame->info);
-	} else if (&binary->in_frame_info)
+	} else if (binary)
 	{
 		pipe = find_pipe_by_num(sh_css_sp_group.pipe[thread_id].pipe_num);
 		if (!pipe)
@@ -1036,7 +1036,7 @@ sh_css_sp_init_stage(struct ia_css_binary *binary,
 			if (!pipe)
 				return IA_CSS_ERR_INTERNAL_ERROR;
 			ia_css_get_crop_offsets(pipe, &args->in_frame->info);
-		} else if (&binary->in_frame_info) {
+		} else if (binary) {
 			pipe = find_pipe_by_num(sh_css_sp_group.pipe[thread_id].pipe_num);
 			if (!pipe)
 				return IA_CSS_ERR_INTERNAL_ERROR;
-- 
2.26.2


WARNING: multiple messages have this Message-ID (diff)
From: Arnd Bergmann <arnd@arndb.de>
To: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: devel@driverdev.osuosl.org, Arnd Bergmann <arnd@arndb.de>,
	linux-kernel@vger.kernel.org, clang-built-linux@googlegroups.com,
	Sakari Ailus <sakari.ailus@linux.intel.com>,
	linux-media@vger.kernel.org
Subject: [PATCH 1/9] staging: media: atomisp: fix incorrect NULL pointer check
Date: Fri, 29 May 2020 22:00:23 +0200	[thread overview]
Message-ID: <20200529200031.4117841-1-arnd@arndb.de> (raw)

Checking the pointer to a member of a struct against NULL
is pointless as clang points out:

drivers/staging/media/atomisp/pci/atomisp_cmd.c:4278:17: error: address of 'config->info' will always evaluate to 'true'

Check the original pointer instead, which may also be
unnecessary here, but makes a little more sense.

Fixes: 9d4fa1a16b28 ("media: atomisp: cleanup directory hierarchy")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/staging/media/atomisp/pci/atomisp_cmd.c | 2 +-
 drivers/staging/media/atomisp/pci/sh_css.c      | 4 ++--
 drivers/staging/media/atomisp/pci/sh_css_sp.c   | 4 ++--
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/staging/media/atomisp/pci/atomisp_cmd.c b/drivers/staging/media/atomisp/pci/atomisp_cmd.c
index 5be690f876c1..342fc3b34fe0 100644
--- a/drivers/staging/media/atomisp/pci/atomisp_cmd.c
+++ b/drivers/staging/media/atomisp/pci/atomisp_cmd.c
@@ -4275,7 +4275,7 @@ int atomisp_param(struct atomisp_sub_device *asd, int flag,
 		    atomisp_css_get_dvs_grid_info(
 			&asd->params.curr_grid_info);
 
-		if (!&config->info) {
+		if (!config) {
 			dev_err(isp->dev, "ERROR: NULL pointer in grid_info\n");
 			return -EINVAL;
 		}
diff --git a/drivers/staging/media/atomisp/pci/sh_css.c b/drivers/staging/media/atomisp/pci/sh_css.c
index d77432254a2c..e91c6029c651 100644
--- a/drivers/staging/media/atomisp/pci/sh_css.c
+++ b/drivers/staging/media/atomisp/pci/sh_css.c
@@ -8534,7 +8534,7 @@ ia_css_pipe_load_extension(struct ia_css_pipe *pipe,
 
 	if (firmware->info.isp.type == IA_CSS_ACC_OUTPUT)
 	{
-		if (&pipe->output_stage)
+		if (pipe)
 			append_firmware(&pipe->output_stage, firmware);
 		else {
 			IA_CSS_LEAVE_ERR_PRIVATE(IA_CSS_ERR_INTERNAL_ERROR);
@@ -8542,7 +8542,7 @@ ia_css_pipe_load_extension(struct ia_css_pipe *pipe,
 		}
 	} else if (firmware->info.isp.type == IA_CSS_ACC_VIEWFINDER)
 	{
-		if (&pipe->vf_stage)
+		if (pipe)
 			append_firmware(&pipe->vf_stage, firmware);
 		else {
 			IA_CSS_LEAVE_ERR_PRIVATE(IA_CSS_ERR_INTERNAL_ERROR);
diff --git a/drivers/staging/media/atomisp/pci/sh_css_sp.c b/drivers/staging/media/atomisp/pci/sh_css_sp.c
index e574396ad0f4..c0e579c1705f 100644
--- a/drivers/staging/media/atomisp/pci/sh_css_sp.c
+++ b/drivers/staging/media/atomisp/pci/sh_css_sp.c
@@ -1022,7 +1022,7 @@ sh_css_sp_init_stage(struct ia_css_binary *binary,
 		if (!pipe)
 			return IA_CSS_ERR_INTERNAL_ERROR;
 		ia_css_get_crop_offsets(pipe, &args->in_frame->info);
-	} else if (&binary->in_frame_info)
+	} else if (binary)
 	{
 		pipe = find_pipe_by_num(sh_css_sp_group.pipe[thread_id].pipe_num);
 		if (!pipe)
@@ -1036,7 +1036,7 @@ sh_css_sp_init_stage(struct ia_css_binary *binary,
 			if (!pipe)
 				return IA_CSS_ERR_INTERNAL_ERROR;
 			ia_css_get_crop_offsets(pipe, &args->in_frame->info);
-		} else if (&binary->in_frame_info) {
+		} else if (binary) {
 			pipe = find_pipe_by_num(sh_css_sp_group.pipe[thread_id].pipe_num);
 			if (!pipe)
 				return IA_CSS_ERR_INTERNAL_ERROR;
-- 
2.26.2

_______________________________________________
devel mailing list
devel@linuxdriverproject.org
http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel

             reply	other threads:[~2020-05-29 20:01 UTC|newest]

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-29 20:00 Arnd Bergmann [this message]
2020-05-29 20:00 ` [PATCH 1/9] staging: media: atomisp: fix incorrect NULL pointer check Arnd Bergmann
2020-05-29 20:00 ` [PATCH 2/9] staging: media: atomisp: declare 'struct device' before using it Arnd Bergmann
2020-05-29 20:00   ` Arnd Bergmann
2020-05-30  2:55   ` Nathan Chancellor
2020-05-30  2:55     ` Nathan Chancellor
2020-05-29 20:00 ` [PATCH 3/9] staging: media: atomisp: annotate an unused function Arnd Bergmann
2020-05-29 20:00   ` Arnd Bergmann
2020-05-30  2:56   ` Nathan Chancellor
2020-05-30  2:56     ` Nathan Chancellor
2020-05-29 20:00 ` [PATCH 4/9] staging: media: atomisp: fix a type conversion warning Arnd Bergmann
2020-05-29 20:00   ` Arnd Bergmann
2020-05-29 20:00 ` [PATCH 5/9] staging: media: atomisp: fix stack overflow in init_pipe_defaults() Arnd Bergmann
2020-05-29 20:00   ` Arnd Bergmann
2020-05-30  2:57   ` Nathan Chancellor
2020-05-30  2:57     ` Nathan Chancellor
2020-05-31 20:41   ` kbuild test robot
2020-05-29 20:00 ` [PATCH 6/9] staging: media: atomisp: fix type mismatch Arnd Bergmann
2020-05-29 20:00   ` Arnd Bergmann
2020-05-29 20:00 ` [PATCH 7/9] staging: media: atomisp: fix enum type mixups Arnd Bergmann
2020-05-29 20:00   ` Arnd Bergmann
2020-05-30  3:00   ` Nathan Chancellor
2020-05-30  3:00     ` Nathan Chancellor
2020-05-29 20:00 ` [PATCH 8/9] staging: media: atomisp: disable all custom formats Arnd Bergmann
2020-05-29 20:00   ` Arnd Bergmann
2020-05-30  3:03   ` Nathan Chancellor
2020-05-30  3:03     ` Nathan Chancellor
2020-05-29 20:00 ` [PATCH 9/9] staging: media: atomisp: add PMIC_OPREGION dependency Arnd Bergmann
2020-05-29 20:00   ` Arnd Bergmann
2020-05-30  3:11   ` Nathan Chancellor
2020-05-30  3:11     ` Nathan Chancellor
2020-05-30  5:25     ` Mauro Carvalho Chehab
2020-05-30  5:25       ` Mauro Carvalho Chehab
2020-05-29 20:04 ` [PATCH 1/9] staging: media: atomisp: fix incorrect NULL pointer check Nick Desaulniers
2020-05-29 20:04   ` Nick Desaulniers
2020-05-29 20:23   ` Arnd Bergmann
2020-05-29 20:23     ` Arnd Bergmann
2020-05-29 20:31     ` Arnd Bergmann
2020-05-29 20:31       ` Arnd Bergmann
2020-05-30  2:49       ` Nathan Chancellor
2020-05-30  2:49         ` Nathan Chancellor
2020-05-30  9:22       ` Mauro Carvalho Chehab
2020-05-30  9:22         ` Mauro Carvalho Chehab

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20200529200031.4117841-1-arnd@arndb.de \
    --to=arnd@arndb.de \
    --cc=clang-built-linux@googlegroups.com \
    --cc=devel@driverdev.osuosl.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-media@vger.kernel.org \
    --cc=mchehab@kernel.org \
    --cc=sakari.ailus@linux.intel.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.