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authorGustavo A. R. Silva <gustavo@embeddedor.com>2019-06-07 13:48:45 -0500
committerMark Brown <broonie@kernel.org>2019-06-10 15:42:09 +0100
commitaef9752274f4045b0dab577e113da63c96832f77 (patch)
tree0297f0e09f5208eaf4869ca72f0ffcc3bf1b10bc /drivers/spi
parent3e582c6e911ffe6c90b9f90324bdf85fc728d0c3 (diff)
spi: Use struct_size() helper
One of the more common cases of allocation size calculations is finding the size of a structure that has a zero-sized array at the end, along with memory for some number of elements for that array. For example: struct spi_replaced_transfers { ... struct spi_transfer inserted_transfers[]; }; Make use of the struct_size() helper instead of an open-coded version in order to avoid any potential type mistakes. So, replace the following form: insert * sizeof(struct spi_transfer) + sizeof(struct spi_replaced_transfers) with: struct_size(rxfer, inserted_transfers, insert) This code was detected with the help of Coccinelle. Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi')
-rw-r--r--drivers/spi/spi.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index 232ed4bb8fca..bced6876de79 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -2750,8 +2750,7 @@ struct spi_replaced_transfers *spi_replace_transfers(
/* allocate the structure using spi_res */
rxfer = spi_res_alloc(msg->spi, __spi_replace_transfers_release,
- insert * sizeof(struct spi_transfer)
- + sizeof(struct spi_replaced_transfers)
+ struct_size(rxfer, inserted_transfers, insert)
+ extradatasize,
gfp);
if (!rxfer)