linux-kernel - [PATCH 1/9] staging: media: atomisp: fix incorrect NULL pointer check

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Message-Id: <20200529200031.4117841-1-arnd@arndb.de>
Date:   Fri, 29 May 2020 22:00:23 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Mauro Carvalho Chehab <mchehab@...nel.org>
Cc:     Sakari Ailus <sakari.ailus@...ux.intel.com>,
        linux-media@...r.kernel.org, devel@...verdev.osuosl.org,
        linux-kernel@...r.kernel.org, clang-built-linux@...glegroups.com,
        Arnd Bergmann <arnd@...db.de>
Subject: [PATCH 1/9] staging: media: atomisp: fix incorrect NULL pointer check

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@...db.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