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Subject[PATCH] 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>

--- drivers/ata/sata_nv.c.before_serror 2007-02-11 17:49:27.000000000 -0600
+++ drivers/ata/sata_nv.c 2007-02-11 17:54:39.000000000 -0600
@@ -827,7 +827,8 @@ static irqreturn_t nv_adma_interrupt(int
/* 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
} 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;
-
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