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ide: allow ide_dev_read_id() to be called from the IRQ context

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* Un-static __ide_wait_stat().

* Allow ide_dev_read_id() helper to be called from the IRQ context by
  adding irq_ctx flag and using mdelay()/__ide_wait_stat() when needed.

* Switch ide_driveid_update() to set irq_ctx flag.

This change is needed for the consecutive patch which fixes races in
handling of user-space SET XFER commands but for improved bisectability
and clarity it is better to do it in a separate patch.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2009-06-23 11:29:11 +00:00 • committed by David S. Miller
parent 2d5abcedeb
commit fa56d4cb40
3 changed files with 26 additions and 14 deletions
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3
include/linux/ide.h
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@ -1081,6 +1081,7 @@ extern void ide_fixstring(u8 *, const int, const int);
int ide_busy_sleep(ide_drive_t *, unsigned long, int);
int __ide_wait_stat(ide_drive_t *, u8, u8, unsigned long, u8 *);
int ide_wait_stat(ide_startstop_t *, ide_drive_t *, u8, u8, unsigned long);
ide_startstop_t ide_do_park_unpark(ide_drive_t *, struct request *);
@ -1169,7 +1170,7 @@ int ide_no_data_taskfile(ide_drive_t *, struct ide_cmd *);
int ide_taskfile_ioctl(ide_drive_t *, unsigned long);
int ide_dev_read_id(ide_drive_t *, u8, u16 *);
int ide_dev_read_id(ide_drive_t *, u8, u16 *, int);
extern int ide_driveid_update(ide_drive_t *);
extern int ide_config_drive_speed(ide_drive_t *, u8);