qd65xx: fix PIO mode selection

PIO4 is a maximum PIO mode supported by a driver.  Using "255" as a max_mode
argument to ide_get_best_pio_mode() could result in wrong timings being used
by a driver (for "pio" equal to 5) or OOPS (for "pio" values > 5 && < 255).
Signed-off-by: default avatarBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Acked-by: default avatarSergei Shtylyov <sshtylyov@ru.mvista.com>
Reviewed-by: default avatarAlan Cox <alan@lxorguk.ukuu.org.uk>
parent 4c6c914e
...@@ -258,8 +258,7 @@ static void qd6580_tune_drive (ide_drive_t *drive, u8 pio) ...@@ -258,8 +258,7 @@ static void qd6580_tune_drive (ide_drive_t *drive, u8 pio)
int recovery_time = 415; /* worst case values from the dos driver */ int recovery_time = 415; /* worst case values from the dos driver */
if (drive->id && !qd_find_disk_type(drive, &active_time, &recovery_time)) { if (drive->id && !qd_find_disk_type(drive, &active_time, &recovery_time)) {
pio = ide_get_best_pio_mode(drive, pio, 255, &d); pio = ide_get_best_pio_mode(drive, pio, 4, &d);
pio = min_t(u8, pio, 4);
switch (pio) { switch (pio) {
case 0: break; case 0: break;
......
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