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ata: pata_macio: Use WARN instead of BUG

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The overflow/underflow conditions in pata_macio_qc_prep() should never
happen. But if they do there's no need to kill the system entirely, a
WARN and failing the IO request should be sufficient and might allow the
system to keep running.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
This commit is contained in:
Michael Ellerman 2024-08-20 13:04:07 +10:00 committed by Damien Le Moal
parent 822c8020ae
commit d4bc0a264f
1 changed files with 5 additions and 2 deletions
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7
drivers/ata/pata_macio.c
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@ -554,7 +554,8 @@ static enum ata_completion_errors pata_macio_qc_prep(struct ata_queued_cmd *qc)
while (sg_len) {
/* table overflow should never happen */
BUG_ON (pi++ >= MAX_DCMDS);
if (WARN_ON_ONCE(pi >= MAX_DCMDS))
return AC_ERR_SYSTEM;
len = (sg_len < MAX_DBDMA_SEG) ? sg_len : MAX_DBDMA_SEG;
table->command = cpu_to_le16(write ? OUTPUT_MORE: INPUT_MORE);
@ -566,11 +567,13 @@ static enum ata_completion_errors pata_macio_qc_prep(struct ata_queued_cmd *qc)
addr += len;
sg_len -= len;
++table;
++pi;
}
}
/* Should never happen according to Tejun */
BUG_ON(!pi);
if (WARN_ON_ONCE(!pi))
return AC_ERR_SYSTEM;
/* Convert the last command to an input/output */
table--;