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Code Issues Releases Wiki Activity

spi: davinci: Remove uninitialized_var() usage

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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/spi/spi-davinci.c: In function ‘davinci_spi_bufs’:
drivers/spi/spi-davinci.c:579:11: warning: unused variable ‘rx_buf_count’ [-Wunused-variable]
  579 |  unsigned rx_buf_count;
      |           ^~~~~~~~~~~~

[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: 048177ce3b ("spi: spi-davinci: convert to DMA engine API")
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Acked-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
This commit is contained in:
Kees Cook 2020-06-03 13:28:45 -07:00
parent eecd48c84f
commit 098c9db476
1 changed files with 0 additions and 1 deletions
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1
drivers/spi/spi-davinci.c
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@ -576,7 +576,6 @@ static int davinci_spi_bufs(struct spi_device *spi, struct spi_transfer *t)
u32 errors = 0;
struct davinci_spi_config *spicfg;
struct davinci_spi_platform_data *pdata;
unsigned uninitialized_var(rx_buf_count);
dspi = spi_master_get_devdata(spi->master);
pdata = &dspi->pdata;