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a=openpgp-sha256; l=2535; i=dmitry.baryshkov@linaro.org; h=from:subject:message-id; bh=abn+V/VW2R04+ivG5L+16aCpi+lS1tSzUvuSfrCga00=; b=owEBbQGS/pANAwAKAYs8ij4CKSjVAcsmYgBnTYasgk4X/0Ogz40yCleICJWnJzduNvDdpABSX EAM9EF7/gWJATMEAAEKAB0WIQRMcISVXLJjVvC4lX+LPIo+Aiko1QUCZ02GrAAKCRCLPIo+Aiko 1fp6CACtGFwJ9kceGBynmVPKNUl3XYUj79S1auIEEtiA3kP/JftPdu5WqzGTXBEZVw6xwsmATbO cOaI7cYBxA6aFk6raoT346wHwii/UrN2/rvHd2ZAuTGUlp+YfxR/m3/Jr6aS/aekEvlpJ4DWjud e/O9fpQU8CkiPREcnFOdwfBa+MLSV3zV/gQ7XgpcqOu+Ftdyjx0sT5TU211n8TGFHt1ooX4Ryvk 0p/hawRQ7uiloIIyMFJ3cmTPChJxRNZQIZ5u4qlW4KH0fr9OikX6kVZDJNXPHXl9Cvy5OtYZ4cy GrOvwQeH4lSMso097djgxo6OIFbZramAvOViCxmINzYqZ5Zk X-Developer-Key: i=dmitry.baryshkov@linaro.org; a=openpgp; fpr=8F88381DD5C873E4AE487DA5199BF1243632046A The msm_dp_utils_pack_sdp_header() accepts an unlimited-size u32 pointer for the header output, while it expects a two-element array. It performs a sizeof check which is always true on 64-bit platforms (since sizeof(u32*) is 8) and is always falce on 32-bit platforms. It returns an error code which nobody actually checks. Fix the function interface to accept u32[2] and return void, skipping all the checks. Fixes: 55fb8ffc1802 ("drm/msm/dp: add VSC SDP support for YUV420 over DP") Signed-off-by: Dmitry Baryshkov Reviewed-by: Stephen Boyd --- drivers/gpu/drm/msm/dp/dp_utils.c | 10 +--------- drivers/gpu/drm/msm/dp/dp_utils.h | 2 +- 2 files changed, 2 insertions(+), 10 deletions(-) diff --git a/drivers/gpu/drm/msm/dp/dp_utils.c b/drivers/gpu/drm/msm/dp/dp_utils.c index 2a40f07fe2d5e20114a7692d1269bb8fd5bddbbd..4a5ebb0c33b85e3d55eb974d74c1f54591301b35 100644 --- a/drivers/gpu/drm/msm/dp/dp_utils.c +++ b/drivers/gpu/drm/msm/dp/dp_utils.c @@ -74,14 +74,8 @@ u8 msm_dp_utils_calculate_parity(u32 data) return parity_byte; } -ssize_t msm_dp_utils_pack_sdp_header(struct dp_sdp_header *sdp_header, u32 *header_buff) +void msm_dp_utils_pack_sdp_header(struct dp_sdp_header *sdp_header, u32 header_buff[2]) { - size_t length; - - length = sizeof(header_buff); - if (length < DP_SDP_HEADER_SIZE) - return -ENOSPC; - header_buff[0] = FIELD_PREP(HEADER_0_MASK, sdp_header->HB0) | FIELD_PREP(PARITY_0_MASK, msm_dp_utils_calculate_parity(sdp_header->HB0)) | FIELD_PREP(HEADER_1_MASK, sdp_header->HB1) | @@ -91,6 +85,4 @@ ssize_t msm_dp_utils_pack_sdp_header(struct dp_sdp_header *sdp_header, u32 *head FIELD_PREP(PARITY_2_MASK, msm_dp_utils_calculate_parity(sdp_header->HB2)) | FIELD_PREP(HEADER_3_MASK, sdp_header->HB3) | FIELD_PREP(PARITY_3_MASK, msm_dp_utils_calculate_parity(sdp_header->HB3)); - - return length; } diff --git a/drivers/gpu/drm/msm/dp/dp_utils.h b/drivers/gpu/drm/msm/dp/dp_utils.h index 88d53157f5b59e352a29075e4e8deb044a6de3bd..2e4f98a863c4cb971e621ac24b8b58f035236e73 100644 --- a/drivers/gpu/drm/msm/dp/dp_utils.h +++ b/drivers/gpu/drm/msm/dp/dp_utils.h @@ -31,6 +31,6 @@ u8 msm_dp_utils_get_g0_value(u8 data); u8 msm_dp_utils_get_g1_value(u8 data); u8 msm_dp_utils_calculate_parity(u32 data); -ssize_t msm_dp_utils_pack_sdp_header(struct dp_sdp_header *sdp_header, u32 *header_buff); +void msm_dp_utils_pack_sdp_header(struct dp_sdp_header *sdp_header, u32 header_buff[2]); #endif /* _DP_UTILS_H_ */