cb->disable_intr may not be set yet when myrb_cleanup is called.
check before using this function pointer.
[ 1.410913] BUG: kernel NULL pointer dereference, address: 0000000000000000
[ 1.411273] #PF: supervisor instruction fetch in kernel mode
[ 1.411566] #PF: error_code(0x0010) - not-present page
[ 1.413138] RIP: 0010:0x0
[ 1.417711] myrb_cleanup+0x13f/0x1b0 [myrb]
[ 1.417939] myrb_probe.cold+0xc6/0x6fc [myrb]
Signed-off-by: Tong Zhang <ztong0001@xxxxxxxxx>
---
drivers/scsi/myrb.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/scsi/myrb.c b/drivers/scsi/myrb.c
index 3d8e91c07dc7..ee33d97fb92c 100644
--- a/drivers/scsi/myrb.c
+++ b/drivers/scsi/myrb.c
@@ -1240,7 +1240,8 @@ static void myrb_cleanup(struct myrb_hba *cb)
myrb_unmap(cb);
if (cb->mmio_base) {
- cb->disable_intr(cb->io_base);
+ if (cb->disable_intr)
+ cb->disable_intr(cb->io_base);
iounmap(cb->mmio_base);
}
if (cb->irq)
--
2.25.1
