Commit 781a07da9bb9 ("Input: ads7846 - add dummy command register
clearing cycle") added commands to struct ser_req::xfer without
expanding it to hold them. Expand the array to the correct size.
../drivers/input/touchscreen/ads7846.c: In function 'ads7846_read12_ser':
../drivers/input/touchscreen/ads7846.c:416:18: error: array subscript 7 is above array bounds of 'struct spi_transfer[6]' [-Werror=array-bounds=]
416 | req->xfer[7].rx_buf = &req->scratch;
| ~~~~~~~~~^~~
../drivers/input/touchscreen/ads7846.c:334:33: note: while referencing 'xfer'
334 | struct spi_transfer xfer[6];
| ^~~~
Fixes: 781a07da9bb9 ("Input: ads7846 - add dummy command register clearing cycle")
Signed-off-by: Kees Cook <kees@xxxxxxxxxx>
---
Cc: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
Cc: Marek Vasut <marex@xxxxxxx>
Cc: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Cc: Linus Walleij <linus.walleij@xxxxxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Luca Ellero <l.ellero@xxxxxxx>
Cc: linux-input@xxxxxxxxxxxxxxx
---
drivers/input/touchscreen/ads7846.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/input/touchscreen/ads7846.c b/drivers/input/touchscreen/ads7846.c
index 75e5b2e4368d..066dc04003fa 100644
--- a/drivers/input/touchscreen/ads7846.c
+++ b/drivers/input/touchscreen/ads7846.c
@@ -331,7 +331,7 @@ struct ser_req {
u8 ref_off;
u16 scratch;
struct spi_message msg;
- struct spi_transfer xfer[6];
+ struct spi_transfer xfer[8];
/*
* DMA (thus cache coherency maintenance) requires the
* transfer buffers to live in their own cache lines.
--
2.34.1
