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| author |   Kees Cook <keescook@chromium.org> | 2020-06-03 13:28:45 -0700 |
|---|---|---|
| committer | Kees Cook <keescook@chromium.org> | 2020-07-16 12:32:26 -0700 |
| commit | 4a2b958b1fb31144a48d261c98885b1e02e1af0e (patch) | |
| tree | 8c59824d937a2d65578823a7f1818292eb3b0f59 /drivers/input | |
| parent | KVM: PPC: Book3S PR: Remove uninitialized_var() usage (diff) | |
| download | linux-dev-4a2b958b1fb31144a48d261c98885b1e02e1af0e.tar.xz linux-dev-4a2b958b1fb31144a48d261c98885b1e02e1af0e.zip | |
media: sur40: Remove uninitialized_var() usage
Using uninitialized_var() is dangerous as it papers over real bugs[1]
(or can in the future), and suppresses unrelated compiler warnings (e.g.
"unused variable"). If the compiler thinks it is uninitialized, either
simply initialize the variable or make compiler changes. As a precursor
to removing[2] this[3] macro[4], just remove this variable since it was
actually unused:
drivers/input/touchscreen/sur40.c:459:6: warning: variable 'packet_id' set but not used [-Wunused-but-set-variable]
459 | u32 packet_id;
| ^~~~~~~~~
However, in keeping with the documentation desires outlined in commit
335abaea7a27 ("Input: sur40 - silence unnecessary noisy debug output"),
comment out the assignment instead of removing it.
[1] https://lore.kernel.org/lkml/20200603174714.192027-1-glider@google.com/
[2] https://lore.kernel.org/lkml/CA+55aFw+Vbj0i=1TGqCR5vQkCzWJ0QxK6CernOU6eedsudAixw@mail.gmail.com/
[3] https://lore.kernel.org/lkml/CA+55aFwgbgqhbp1fkxvRKEpzyR5J8n1vKT1VZdz9knmPuXhOeg@mail.gmail.com/
[4] https://lore.kernel.org/lkml/CA+55aFz2500WfbKXAx8s67wrm9=yVJu65TpLgN_ybYNv0VEOKA@mail.gmail.com/
Fixes: 335abaea7a27 ("Input: sur40 - silence unnecessary noisy debug output")
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Diffstat (limited to 'drivers/input')
| -rw-r--r-- | drivers/input/touchscreen/sur40.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/drivers/input/touchscreen/sur40.c b/drivers/input/touchscreen/sur40.c index 34d31c7ec8ba..620cdd7d214a 100644 --- a/drivers/input/touchscreen/sur40.c +++ b/drivers/input/touchscreen/sur40.c @@ -456,8 +456,6 @@ static void sur40_poll(struct input_dev *input) { struct sur40_state *sur40 = input_get_drvdata(input); int result, bulk_read, need_blobs, packet_blobs, i; - u32 uninitialized_var(packet_id); - struct sur40_header *header = &sur40->bulk_in_buffer->header; struct sur40_blob *inblob = &sur40->bulk_in_buffer->blobs[0]; @@ -491,7 +489,7 @@ static void sur40_poll(struct input_dev *input) if (need_blobs == -1) { need_blobs = le16_to_cpu(header->count); dev_dbg(sur40->dev, "need %d blobs\n", need_blobs); - packet_id = le32_to_cpu(header->packet_id); + /* packet_id = le32_to_cpu(header->packet_id); */ } /* |