linux-kernel - [PATCH 4.4 030/132] media: msi2500: assign SPI bus number dynamically

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Date:   Mon, 28 Dec 2020 13:48:34 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Antti Palosaari <crope@....fi>,
        Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
        syzbot+c60ddb60b685777d9d59@...kaller.appspotmail.com
Subject: [PATCH 4.4 030/132] media: msi2500: assign SPI bus number dynamically

From: Antti Palosaari <crope@....fi>

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@...kaller.appspotmail.com

Cc: stable@...r.kernel.org
Signed-off-by: Antti Palosaari <crope@....fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 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
@@ -1254,7 +1254,7 @@ 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);