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spi: ti-qspi: Make sure res_mmap != NULL before dereferencing it

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resource_size() is dereferencing the res without checking that it is
not NULL, so we need to do the check before calling resource_size().

Fixes: b95cb394ab ("spi: ti-qspi: Implement the spi_mem interface")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Boris Brezillon 2018-05-14 11:11:29 +02:00 committed by Mark Brown
parent e935dba111
commit 6282f12291
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GPG key ID: 24D68B725D5487D0
1 changed files with 3 additions and 1 deletions
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4
drivers/spi/spi-ti-qspi.c
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@ -718,7 +718,9 @@ static int ti_qspi_probe(struct platform_device *pdev)
"memory mapped resource not required\n");
}
}
qspi->mmap_size = resource_size(res_mmap);
if (res_mmap)
qspi->mmap_size = resource_size(res_mmap);
irq = platform_get_irq(pdev, 0);
if (irq < 0) {