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