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libata-scsi: use u8 array to store mode page copy

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ata_mselect_*() would initialize a char array for storing a copy of
the current mode page. However, char could be signed char. In that
case, bytes larger than 127 would be converted to negative number.

For example, 0xff from def_control_mpage[] would become -1. This
prevented ata_mselect_control() from working at all, since when it
did the read-only bits check, there would always be a mismatch.

Signed-off-by: Tom Yan <tom.ty89@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Tom Yan 2016-07-23 02:34:08 +08:00 committed by Tejun Heo
parent 29b4817d40
commit d7372cb629
1 changed files with 2 additions and 2 deletions
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4
drivers/ata/libata-scsi.c
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@ -3610,7 +3610,7 @@ static int ata_mselect_caching(struct ata_queued_cmd *qc,
{
struct ata_taskfile *tf = &qc->tf;
struct ata_device *dev = qc->dev;
char mpage[CACHE_MPAGE_LEN];
u8 mpage[CACHE_MPAGE_LEN];
u8 wce;
int i;
@ -3666,7 +3666,7 @@ static int ata_mselect_control(struct ata_queued_cmd *qc,
const u8 *buf, int len, u16 *fp)
{
struct ata_device *dev = qc->dev;
char mpage[CONTROL_MPAGE_LEN];
u8 mpage[CONTROL_MPAGE_LEN];
u8 d_sense;
int i;