[PATCH 4.19 124/338] ray_cs: Check ioremap return value

Greg Kroah-Hartman
2022-04-14T13:33:56Z

From: Jiasheng Jiang <jiasheng@iscas.ac.cn>

[ Upstream commit 7e4760713391ee46dc913194b33ae234389a174e ]

As the possible failure of the ioremap(), the 'local->sram' and other
two could be NULL.
Therefore it should be better to check it in order to avoid the later
dev_dbg.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20211230022926.1846757-1-jiasheng@iscas.ac.cn
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/wireless/ray_cs.c | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/drivers/net/wireless/ray_cs.c b/drivers/net/wireless/ray_cs.c
index 08c607c031bc..8704bae39e1b 100644
--- a/drivers/net/wireless/ray_cs.c
+++ b/drivers/net/wireless/ray_cs.c
@@ -394,6 +394,8 @@ static int ray_config(struct pcmcia_device *link)
goto failed;
local->sram = ioremap(link->resource[2]->start,
resource_size(link->resource[2]));
+ if (!local->sram)
+ goto failed;

/*** Set up 16k window for shared memory (receive buffer) ***************/
link->resource[3]->flags |=
@@ -408,6 +410,8 @@ static int ray_config(struct pcmcia_device *link)
goto failed;
local->rmem = ioremap(link->resource[3]->start,
resource_size(link->resource[3]));
+ if (!local->rmem)
+ goto failed;

/*** Set up window for attribute memory ***********************************/
link->resource[4]->flags |=
@@ -422,6 +426,8 @@ static int ray_config(struct pcmcia_device *link)
goto failed;
local->amem = ioremap(link->resource[4]->start,
resource_size(link->resource[4]));
+ if (!local->amem)
+ goto failed;

dev_dbg(&link->dev, "ray_config sram=%p\n", local->sram);
dev_dbg(&link->dev, "ray_config rmem=%p\n", local->rmem);
--
2.34.1