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[PATCH] ide: fix error handling for drives which clear the FIFO on error 

If the controller FIFO cleared automatically on error we must not try
and drain it as this will hang some chips.

Based in concept on a broken patch from -mm some while back

Signed-off-by: Alan Cox <alan@redhat.com>
Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Cc: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Alan Cox 2006-06-28 04:27:01 -07:00 committed by Linus Torvalds
parent 2930d1bed7
commit da574af755
2 changed files with 2 additions and 1 deletions
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2
drivers/ide/ide-io.c
View File

@ -505,7 +505,7 @@ static ide_startstop_t ide_ata_error(ide_drive_t *drive, struct request *rq, u8
}
}
if ((stat & DRQ_STAT) && rq_data_dir(rq) == READ)
if ((stat & DRQ_STAT) && rq_data_dir(rq) == READ && hwif->err_stops_fifo == 0)
try_to_flush_leftover_data(drive);
if (hwif->INB(IDE_STATUS_REG) & (BUSY_STAT|DRQ_STAT))

1
include/linux/ide.h
View File

@ -793,6 +793,7 @@ typedef struct hwif_s {
unsigned auto_poll : 1; /* supports nop auto-poll */
unsigned sg_mapped : 1; /* sg_table and sg_nents are ready */
unsigned no_io_32bit : 1; /* 1 = can not do 32-bit IO ops */
unsigned err_stops_fifo : 1; /* 1=data FIFO is cleared by an error */
struct device gendev;
struct completion gendev_rel_comp; /* To deal with device release() */