From: Kees Cook Date: Wed, 3 Jun 2020 20:28:45 +0000 (-0700) Subject: spi: davinci: Remove uninitialized_var() usage X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=098c9db4767095a20ae3ab78a186eb1ae097a5c1;p=uclinux-h8%2Flinux.git spi: davinci: 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/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: 048177ce3b39 ("spi: spi-davinci: convert to DMA engine API") Reviewed-by: Nick Desaulniers Acked-by: Mark Brown Signed-off-by: Kees Cook --- diff --git a/drivers/spi/spi-davinci.c b/drivers/spi/spi-davinci.c index f71c497393a6..f50c0c79cbdf 100644 --- a/drivers/spi/spi-davinci.c +++ b/drivers/spi/spi-davinci.c @@ -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;