Commit da574af7 authored by Alan Cox's avatar Alan Cox Committed by Linus Torvalds
Browse files

[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: default avatarAlan Cox <alan@redhat.com>
Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Cc: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 2930d1be
......@@ -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))
......
......@@ -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() */
......
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment