libata: set NODEV_HINT for 0x7f status

[safe/jmp/linux-2.6] / drivers / ata / libata-sff.c

diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c
index 0a8567c..0b299b0 100644 (file)
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -1358,6 +1358,16 @@ fsm_start:
                                        qc->err_mask |= AC_ERR_HSM;
                                }
 
+                               /* There are oddball controllers with
+                                * status register stuck at 0x7f and
+                                * lbal/m/h at zero which makes it
+                                * pass all other presence detection
+                                * mechanisms we have.  Set NODEV_HINT
+                                * for it.  Kernel bz#7241.
+                                */
+                               if (status == 0x7f)
+                                       qc->err_mask |= AC_ERR_NODEV_HINT;
+
                                /* ata_pio_sectors() might change the
                                 * state to HSM_ST_LAST. so, the state
                                 * is changed after ata_pio_sectors().