diff options
| author | Arnd Bergmann <arnd@arndb.de> | 2021-01-03 16:57:29 +0300 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2021-01-04 15:38:36 +0300 |
| commit | 0bd1bf86ab79555425b9f0b63005e181defe4da6 (patch) | |
| tree | 351085ec5a122f4fbde7a4fbc56544f5e4e993c9 /drivers/dma/qcom/gpi.c | |
| parent | cc465fa269bc0dc63a1ab7384110e4079fb40421 (diff) | |
| download | linux-0bd1bf86ab79555425b9f0b63005e181defe4da6.tar.xz | |
dmaengine: qcom: fix gpi undefined behavior
gcc points out an incorrect error handling loop:
drivers/dma/qcom/gpi.c: In function 'gpi_ch_init':
drivers/dma/qcom/gpi.c:1254:15: error: iteration 2 invokes undefined behavior [-Werror=aggressive-loop-optimizations]
1254 | struct gpii *gpii = gchan->gpii;
| ^~~~
drivers/dma/qcom/gpi.c:1951:2: note: within this loop
1951 | for (i = i - 1; i >= 0; i++) {
| ^~~
Change the loop to correctly walk backwards through the
initialized fields rather than off into the woods.
Fixes: 5d0c3533a19f ("dmaengine: qcom: Add GPI dma driver")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20210103135738.3741123-1-arnd@kernel.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma/qcom/gpi.c')
| -rw-r--r-- | drivers/dma/qcom/gpi.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/dma/qcom/gpi.c b/drivers/dma/qcom/gpi.c index 556c070a514c..1a0bf6b0567a 100644 --- a/drivers/dma/qcom/gpi.c +++ b/drivers/dma/qcom/gpi.c @@ -1948,7 +1948,7 @@ static int gpi_ch_init(struct gchan *gchan) return ret; error_start_chan: - for (i = i - 1; i >= 0; i++) { + for (i = i - 1; i >= 0; i--) { gpi_stop_chan(&gpii->gchan[i]); gpi_send_cmd(gpii, gchan, GPI_CH_CMD_RESET); } |