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scsi: st: Replace GFP_ATOMIC with GFP_KERNEL in st_probe 

st_probe() is never called in atomic context. st_probe() is only set as
".probe" in struct scsi_driver.

Despite never getting called from atomic context, st_probe() calls
kzalloc() with GFP_ATOMIC, which does not sleep for allocation.
GFP_ATOMIC is not necessary and can be replaced with GFP_KERNEL, which
can sleep and improve the possibility of sucessful allocation.

This is found by a static analysis tool named DCNS written by myself.
And I also manually check it.

Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Jia-Ju Bai 2018-04-10 20:37:59 +08:00 committed by Martin K. Petersen
parent c360652006
commit 1f618aac2f
1 changed files with 1 additions and 1 deletions
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2
drivers/scsi/st.c
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@ -4290,7 +4290,7 @@ static int st_probe(struct device *dev)
goto out_buffer_free;
}
tpnt = kzalloc(sizeof(struct scsi_tape), GFP_ATOMIC);
tpnt = kzalloc(sizeof(struct scsi_tape), GFP_KERNEL);
if (tpnt == NULL) {
sdev_printk(KERN_ERR, SDp,
"st: Can't allocate device descriptor.\n");