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ide: don't enable IORDY at a probe time

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* Add 'unsigned long port_flags' field to ide_hwif_t.

* Add IDE_PFLAG_PROBING port flag and keep it set during probing.

* Fix ide_pio_need_iordy() to not enable IORDY at a probe time
  (IORDY may lead to controller lock up on certain controllers
   if the port is not occupied).

Loosely based on the recent libata's fix by Tejun, thanks to Alan
for the hint that IDE may also need it.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz
2009-06-15 18:52:54 +02:00
parent c9ef59ff01
commit 5880b5de71
3 changed files with 27 additions and 1 deletions
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6
include/linux/ide.h
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@@ -661,6 +661,10 @@ struct ide_dma_ops {
u8 (*dma_sff_read_status)(struct hwif_s *);
};
enum {
IDE_PFLAG_PROBING = (1 << 0),
};
struct ide_host;
typedef struct hwif_s {
@@ -677,6 +681,8 @@ typedef struct hwif_s {
ide_drive_t *devices[MAX_DRIVES + 1];
unsigned long port_flags;
u8 major; /* our major number */
u8 index; /* 0 for ide0; 1 for ide1; ... */
u8 channel; /* for dual-port chips: 0=primary, 1=secondary */