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| author | Michael Ellerman <mpe@ellerman.id.au> | 2024-08-20 05:04:07 +0200 |
|---|---|---|
| committer | Damien Le Moal <dlemoal@kernel.org> | 2024-08-21 07:33:23 +0200 |
| commit | d4bc0a264fb482b019c84fbc7202dd3cab059087 (patch) | |
| tree | 552fd2b6ec7f2d352e9c152f49631c738498ce7b /drivers/ata/pata_macio.c | |
| parent | ata: pata_macio: Fix DMA table overflow (diff) | |
| download | linux-d4bc0a264fb482b019c84fbc7202dd3cab059087.tar.xz linux-d4bc0a264fb482b019c84fbc7202dd3cab059087.zip | |
ata: pata_macio: Use WARN instead of BUG
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>
Diffstat (limited to 'drivers/ata/pata_macio.c')
| -rw-r--r-- | drivers/ata/pata_macio.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/ata/pata_macio.c b/drivers/ata/pata_macio.c index 1cb8d24b088f..f2f36e55a1f4 100644 --- a/drivers/ata/pata_macio.c +++ b/drivers/ata/pata_macio.c @@ -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--; |