fsl/fman: Check for null pointer after calling devm_ioremap

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As the possible failure of the allocation, the devm_ioremap() may return
NULL pointer.
Take tgec_initialization() as an example.
If allocation fails, the params->base_addr will be NULL pointer and will
be assigned to tgec->regs in tgec_config().
Then it will cause the dereference of NULL pointer in set_mac_address(),
which is called by tgec_init().
Therefore, it should be better to add the sanity check after the calling
of the devm_ioremap().

Fixes: 3933961682 ("fsl/fman: Add FMan MAC driver")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Jiasheng Jiang 2022-01-06 18:04:10 +08:00 • committed by David S. Miller

parent 43d0121231

commit d5a73ec96c

1 changed files with 16 additions and 5 deletions

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drivers/net/ethernet/freescale/fman/mac.c

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