with "mmc: tmio: implement a bounce buffer for unaligned DMA"
gcc generates the following warnings:
drivers/mmc/host/tmio_mmc.c:654:6: warning: 'ret' may be used uninitialized in
this function
drivers/mmc/host/tmio_mmc.c:730:6: warning: 'ret' may be used uninitialized in
this function
This patch fixes these by setting ret to -EINVAL in the affected code paths.
This patch applies on top of -rc6 plus the following patches:
mmc: tmio_mmc: allow multi-element scatter-gather lists
mmc: tmio_mmc: fix PIO fallback on DMA descriptor allocation failure
mmc: tmio: merge the private header into the driver
mmc: tmio: implement a bounce buffer for unaligned DMA
Signed-off-by: Arnd Hannemann <a...@arndnet.de>
---
drivers/mmc/host/tmio_mmc.c | 8 ++++++--
1 files changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/mmc/host/tmio_mmc.c b/drivers/mmc/host/tmio_mmc.c
index 57ece9d..61e97d1 100644
--- a/drivers/mmc/host/tmio_mmc.c
+++ b/drivers/mmc/host/tmio_mmc.c
@@ -665,8 +665,10 @@ static void tmio_mmc_start_dma_rx(struct tmio_mmc_host
*host)
}
if ((!aligned && (host->sg_len > 1 || sg->length > PAGE_CACHE_SIZE ||
- align >= MAX_ALIGN)) || !multiple)
+ align >= MAX_ALIGN)) || !multiple) {
+ ret = -EINVAL;
goto pio;
+ }
/* The only sg element can be unaligned, use our bounce buffer then */
if (!aligned) {
@@ -741,8 +743,10 @@ static void tmio_mmc_start_dma_tx(struct tmio_mmc_host
*host)
}
if ((!aligned && (host->sg_len > 1 || sg->length > PAGE_CACHE_SIZE ||
- align >= MAX_ALIGN)) || !multiple)
+ align >= MAX_ALIGN)) || !multiple) {
+ ret = -EINVAL;
goto pio;
+ }
/* The only sg element can be unaligned, use our bounce buffer then */
if (!aligned) {
--
1.7.2.3
--
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