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mwifiex: process pcie io memory read failure case

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It is observed that ioread32 may fail to read pcie register
in certain scenarios, this patch handles these cases.

Signed-off-by: Xinming Hu <huxm@marvell.com>
Signed-off-by: Cathy Luo <cluo@marvell.com>
Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Xinming Hu
2016-02-02 22:05:03 -08:00
committed by Kalle Valo
parent 6970cd446c
commit af05148392
1 changed files with 2 additions and 0 deletions
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2
drivers/net/wireless/marvell/mwifiex/pcie.c
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@@ -323,6 +323,8 @@ static int mwifiex_read_reg(struct mwifiex_adapter *adapter, int reg, u32 *data)
struct pcie_service_card *card = adapter->card;
*data = ioread32(card->pci_mmap1 + reg);
if (*data == 0xffffffff)
return 0xffffffff;
return 0;
}