6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Arnd Bergmann arnd@arndb.de
[ Upstream commit 5954ad7d1af92cb6244c5f31216e43af55febbb7 ]
Building with a reduced stack warning limit shows that delta_mjpeg_decode() copies a giant structure to the stack each time but only uses three of its members:
drivers/media/platform/st/sti/delta/delta-mjpeg-dec.c: In function 'delta_mjpeg_decode': drivers/media/platform/st/sti/delta/delta-mjpeg-dec.c:427:1: error: the frame size of 1296 bytes is larger than 1280 bytes [-Werror=frame-larger-than=]
Open-code the passing of the structure members that are actually used here.
Fixes: 433ff5b4a29b ("[media] st-delta: add mjpeg support") Signed-off-by: Arnd Bergmann arnd@arndb.de Signed-off-by: Hans Verkuil hverkuil+cisco@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- .../platform/st/sti/delta/delta-mjpeg-dec.c | 20 ++++++++++--------- 1 file changed, 11 insertions(+), 9 deletions(-)
diff --git a/drivers/media/platform/st/sti/delta/delta-mjpeg-dec.c b/drivers/media/platform/st/sti/delta/delta-mjpeg-dec.c index 0533d4a083d24..a078f1107300e 100644 --- a/drivers/media/platform/st/sti/delta/delta-mjpeg-dec.c +++ b/drivers/media/platform/st/sti/delta/delta-mjpeg-dec.c @@ -239,7 +239,7 @@ static int delta_mjpeg_ipc_open(struct delta_ctx *pctx) return 0; }
-static int delta_mjpeg_ipc_decode(struct delta_ctx *pctx, struct delta_au *au) +static int delta_mjpeg_ipc_decode(struct delta_ctx *pctx, dma_addr_t pstart, dma_addr_t pend) { struct delta_dev *delta = pctx->dev; struct delta_mjpeg_ctx *ctx = to_ctx(pctx); @@ -256,8 +256,8 @@ static int delta_mjpeg_ipc_decode(struct delta_ctx *pctx, struct delta_au *au)
memset(params, 0, sizeof(*params));
- params->picture_start_addr_p = (u32)(au->paddr); - params->picture_end_addr_p = (u32)(au->paddr + au->size - 1); + params->picture_start_addr_p = pstart; + params->picture_end_addr_p = pend;
/* * !WARNING! @@ -374,12 +374,14 @@ static int delta_mjpeg_decode(struct delta_ctx *pctx, struct delta_au *pau) struct delta_dev *delta = pctx->dev; struct delta_mjpeg_ctx *ctx = to_ctx(pctx); int ret; - struct delta_au au = *pau; + void *au_vaddr = pau->vaddr; + dma_addr_t au_dma = pau->paddr; + size_t au_size = pau->size; unsigned int data_offset = 0; struct mjpeg_header *header = &ctx->header_struct;
if (!ctx->header) { - ret = delta_mjpeg_read_header(pctx, au.vaddr, au.size, + ret = delta_mjpeg_read_header(pctx, au_vaddr, au_size, header, &data_offset); if (ret) { pctx->stream_errors++; @@ -405,17 +407,17 @@ static int delta_mjpeg_decode(struct delta_ctx *pctx, struct delta_au *pau) goto err; }
- ret = delta_mjpeg_read_header(pctx, au.vaddr, au.size, + ret = delta_mjpeg_read_header(pctx, au_vaddr, au_size, ctx->header, &data_offset); if (ret) { pctx->stream_errors++; goto err; }
- au.paddr += data_offset; - au.vaddr += data_offset; + au_dma += data_offset; + au_vaddr += data_offset;
- ret = delta_mjpeg_ipc_decode(pctx, &au); + ret = delta_mjpeg_ipc_decode(pctx, au_dma, au_dma + au_size - 1); if (ret) goto err;