[v2] usb: musb: tusb6010: uninitialized data in tusb_fifo_write_unaligned()

Commit Message

Dan Carpenter Sept. 16, 2021, 1:57 p.m. UTC

This is writing to the first 1 - 3 bytes of "val" and then writing all
four bytes to musb_writel().  The last byte is always going to be
garbage.  Zero out the last bytes instead.

Fixes: 550a7375fe72 ("USB: Add MUSB and TUSB support")
Signed-off-by: Dan Carpenter <[e-mail]>
---
v2: I mixed up "len" and "val".  Thanks for catching that Christophe
JAILLET!

 drivers/usb/musb/tusb6010.c | 1 +
 1 file changed, 1 insertion(+)

Patch

diff --git a/drivers/usb/musb/tusb6010.c b/drivers/usb/musb/tusb6010.c
index c42937692207..c968ecda42aa 100644
--- a/drivers/usb/musb/tusb6010.c
+++ b/drivers/usb/musb/tusb6010.c
@@ -190,6 +190,7 @@  tusb_fifo_write_unaligned(void __iomem *fifo, const u8 *buf, u16 len)
 	}
 	if (len > 0) {
 		/* Write the rest 1 - 3 bytes to FIFO */
+		val = 0;
 		memcpy(&val, buf, len);
 		musb_writel(fifo, 0, val);
 	}