blob: 8413066a2ca2b3b98c3c483d9fc68e621d9920ad (
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Dump stack once on unsupported commands to see who is submitting them.
(#632753)
--- linux-2.6.34.noarch.orig/drivers/ata/pata_it821x.c
+++ linux-2.6.34.noarch/drivers/ata/pata_it821x.c
@@ -399,6 +399,16 @@ static void it821x_passthru_dev_select(s
ata_sff_dev_select(ap, device);
}
+static void it821x_dump_stack_once(void)
+{
+ static int dumped = 0;
+
+ if (!dumped) {
+ dump_stack();
+ dumped = 1;
+ }
+}
+
/**
* it821x_smart_qc_issue - wrap qc issue prot
* @qc: command
@@ -433,6 +443,7 @@ static unsigned int it821x_smart_qc_issu
return ata_sff_qc_issue(qc);
}
printk(KERN_DEBUG "it821x: can't process command 0x%02X\n", qc->tf.command);
+ it821x_dump_stack_once();
return AC_ERR_DEV;
}
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