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| author | Alan Stern <stern@rowland.harvard.edu> | 2014-01-16 00:37:04 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-04-23 03:49:20 +0400 |
| commit | d8e33d97e0166d8cd521daa83ae33f85001a6e33 (patch) | |
| tree | 14454c754a1f7a337e6b53028af6837b39b4d97b | |
| parent | 4f06f7c753fcca37fc349d37f68aadcf69f963e4 (diff) | |
| download | linux-d8e33d97e0166d8cd521daa83ae33f85001a6e33.tar.xz | |
SCSI: sd: don't fail if the device doesn't recognize SYNCHRONIZE CACHE
commit 7aae51347b21eb738dc1981df1365b57a6c5ee4e upstream.
Evidently some wacky USB-ATA bridges don't recognize the SYNCHRONIZE
CACHE command, as shown in this email thread:
http://marc.info/?t=138978356200002&r=1&w=2
The fact that we can't tell them to drain their caches shouldn't
prevent the system from going into suspend. Therefore sd_sync_cache()
shouldn't return an error if the device replies with an Invalid
Command ASC.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Reported-by: Sven Neumann <s.neumann@raumfeld.com>
Tested-by: Daniel Mack <zonque@gmail.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/scsi/sd.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index 69725f7c32c1..410be822d59d 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -1463,8 +1463,8 @@ static int sd_sync_cache(struct scsi_disk *sdkp) sd_print_sense_hdr(sdkp, &sshdr); /* we need to evaluate the error return */ if (scsi_sense_valid(&sshdr) && - /* 0x3a is medium not present */ - sshdr.asc == 0x3a) + (sshdr.asc == 0x3a || /* medium not present */ + sshdr.asc == 0x20)) /* invalid command */ /* this is no error here */ return 0; |