[PATCH 4.9 047/175] media: msi2500: assign SPI bus number dynamically

From: Greg Kroah-Hartman
Date: Mon Dec 28 2020 - 08:01:10 EST


From: Antti Palosaari <crope@xxxxxx>

commit 9c60cc797cf72e95bb39f32316e9f0e5f85435f9 upstream.

SPI bus number must be assigned dynamically for each device, otherwise it
will crash when multiple devices are plugged to system.

Reported-and-tested-by: syzbot+c60ddb60b685777d9d59@xxxxxxxxxxxxxxxxxxxxxxxxx

Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Antti Palosaari <crope@xxxxxx>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
drivers/media/usb/msi2500/msi2500.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/media/usb/msi2500/msi2500.c
+++ b/drivers/media/usb/msi2500/msi2500.c
@@ -1250,7 +1250,7 @@ static int msi2500_probe(struct usb_inte
}

dev->master = master;
- master->bus_num = 0;
+ master->bus_num = -1;
master->num_chipselect = 1;
master->transfer_one_message = msi2500_transfer_one_message;
spi_master_set_devdata(master, dev);