diff options
| author | Nathan Chancellor <nathan@kernel.org> | 2023-10-12 10:04:01 -0700 |
|---|---|---|
| committer | Mathieu Poirier <mathieu.poirier@linaro.org> | 2023-10-16 11:24:34 -0600 |
| commit | 3d8a18697ad834436d088d65cc66165947cfe600 (patch) | |
| tree | e2690a4d81821dcc6dc24e241174796e413d85bb /drivers/remoteproc/st_remoteproc.c | |
| parent | 5c77ebcd05acf3789949c8a387df72381d949ca2 (diff) | |
| download | lwn-3d8a18697ad834436d088d65cc66165947cfe600.tar.gz lwn-3d8a18697ad834436d088d65cc66165947cfe600.zip | |
remoteproc: st: Fix sometimes uninitialized ret in st_rproc_probe()
Clang warns (or errors with CONFIG_WERROR=y):
drivers/remoteproc/st_remoteproc.c:357:6: error: variable 'ret' is used uninitialized whenever 'if' condition is true [-Werror,-Wsometimes-uninitialized]
357 | if (!ddata->config)
| ^~~~~~~~~~~~~~
drivers/remoteproc/st_remoteproc.c:442:9: note: uninitialized use occurs here
442 | return ret;
| ^~~
drivers/remoteproc/st_remoteproc.c:357:2: note: remove the 'if' if its condition is always false
357 | if (!ddata->config)
| ^~~~~~~~~~~~~~~~~~~
358 | goto free_rproc;
| ~~~~~~~~~~~~~~~
drivers/remoteproc/st_remoteproc.c:348:9: note: initialize the variable 'ret' to silence this warning
348 | int ret, i;
| ^
| = 0
1 error generated.
Set ret to -ENODEV, which seems to be a standard return code when
device_get_match_data() returns NULL.
Closes: https://github.com/ClangBuiltLinux/linux/issues/1944
Fixes: 5c77ebcd05ac ("remoteproc: st: Use device_get_match_data()")
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Link: https://lore.kernel.org/r/20231012-st_remoteproc-fix-sometimes-uninit-v1-1-f64d0f2d5b37@kernel.org
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Diffstat (limited to 'drivers/remoteproc/st_remoteproc.c')
| -rw-r--r-- | drivers/remoteproc/st_remoteproc.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/remoteproc/st_remoteproc.c b/drivers/remoteproc/st_remoteproc.c index b0638f984842..cb163766c56d 100644 --- a/drivers/remoteproc/st_remoteproc.c +++ b/drivers/remoteproc/st_remoteproc.c @@ -354,8 +354,10 @@ static int st_rproc_probe(struct platform_device *pdev) rproc->has_iommu = false; ddata = rproc->priv; ddata->config = (struct st_rproc_config *)device_get_match_data(dev); - if (!ddata->config) + if (!ddata->config) { + ret = -ENODEV; goto free_rproc; + } platform_set_drvdata(pdev, rproc); |