sata_nv: handle SError status indication

ADMA-capable controllers provide a bit in the status register that appears
to indicate that the controller detected an SError condition. Update sata_nv
to detect this and trigger error handling in order to handle the fault.

Signed-off-by: Robert Hancock <hancockr@shaw.ca>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

diff --git a/drivers/ata/sata_nv.c b/drivers/ata/sata_nv.c
index 095ef1b..ab92f20 100644 (file)
--- a/drivers/ata/sata_nv.c
+++ b/drivers/ata/sata_nv.c
@@ -827,7 +827,8 @@ static irqreturn_t nv_adma_interrupt(int irq, void *dev_instance)
                        /* freeze if hotplugged or controller error */
                        if (unlikely(status & (NV_ADMA_STAT_HOTPLUG |
                                               NV_ADMA_STAT_HOTUNPLUG |
-                                              NV_ADMA_STAT_TIMEOUT))) {
+                                              NV_ADMA_STAT_TIMEOUT |
+                                              NV_ADMA_STAT_SERROR))) {
                                struct ata_eh_info *ehi = &ap->eh_info;
 
                                ata_ehi_clear_desc(ehi);
@@ -841,6 +842,9 @@ static irqreturn_t nv_adma_interrupt(int irq, void *dev_instance)
                                } else if (status & NV_ADMA_STAT_HOTUNPLUG) {
                                        ata_ehi_hotplugged(ehi);
                                        ata_ehi_push_desc(ehi, ": hot unplug");
+                               } else if (status & NV_ADMA_STAT_SERROR) {
+                                       /* let libata analyze SError and figure out the cause */
+                                       ata_ehi_push_desc(ehi, ": SError");
                                }
                                ata_port_freeze(ap);
                                continue;