The driver may sleep in the interrupt handler.
The function call path is:
esas2r_adapter_tasklet (interrupt handler)
esas2r_do_tasklet_tasks
esas2r_handle_chip_rst_during_tasklet
esas2r_init_adapter_hw
esas2r_nvram_read_direct
esas2r_read_flash_block
esas2r_flash_access
schedule_timeout_interruptible --> may sleep
To fix it, schedule_timeout_uninterruptible is replaced with mdelay.
This bug is found by my static analysis tool(DSAC) and checked by my code review.
Signed-off-by: Jia-Ju Bai <baijiaju1990@xxxxxxx>
---
drivers/scsi/esas2r/esas2r_flash.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/scsi/esas2r/esas2r_flash.c b/drivers/scsi/esas2r/esas2r_flash.c
index 7bd376d..9b3da4c 100644
--- a/drivers/scsi/esas2r/esas2r_flash.c
+++ b/drivers/scsi/esas2r/esas2r_flash.c
@@ -965,7 +965,7 @@ static bool esas2r_flash_access(struct esas2r_adapter *a, u32 function)
break;
}
- schedule_timeout_interruptible(msecs_to_jiffies(100));
+ mdelay(100);
if ((jiffies_to_msecs(jiffies) - starttime) > timeout) {
/*
--
1.7.9.5
