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authorDamien Le Moal <damien.lemoal@wdc.com>2016-12-19 10:17:40 +0900
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-02-09 08:08:27 +0100
commit4b70d598c2ee1f47871ba12db832fcbbb4adb491 (patch)
tree15ab787c87a97884ddfdbc0efb2253885075c019 /drivers/ata
parent6d08607ef35bb8abeb0a2212fbdf85e0af4d5df1 (diff)
libata: Fix ATA request sense
commit 2dae99558e86894e9e5dbf097477baaa5eb70134 upstream. For an ATA device supporting the sense data reporting feature set, a failed command will trigger the execution of ata_eh_request_sense if the result task file of the failed command has the ATA_SENSE bit set (sense data available bit). ata_eh_request_sense executes the REQUEST SENSE DATA EXT command to retrieve the sense data of the failed command. On success of REQUEST SENSE DATA EXT, the ATA_SENSE bit will NOT be set (the command succeeded) but ata_eh_request_sense nevertheless tests the availability of sense data by testing that bit presence in the result tf of the REQUEST SENSE DATA EXT command. This leads us to falsely assume that request sense data failed and to the warning message: atax.xx: request sense failed stat 50 emask 0 Upon success of REQUEST SENSE DATA EXT, set the ATA_SENSE bit in the result task file command so that sense data can be returned by ata_eh_request_sense. Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com> Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/ata')
-rw-r--r--drivers/ata/libata-core.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 1a57de7e1ba4..33e363dcc63b 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -1695,6 +1695,8 @@ unsigned ata_exec_internal_sg(struct ata_device *dev,
if (qc->err_mask & ~AC_ERR_OTHER)
qc->err_mask &= ~AC_ERR_OTHER;
+ } else if (qc->tf.command == ATA_CMD_REQ_SENSE_DATA) {
+ qc->result_tf.command |= ATA_SENSE;
}
/* finish up */