diff options
Diffstat (limited to 'meta-amd-bsp/recipes-kernel/linux-4.19/linux-yocto-4.19.8/0054-drm-amd-display-Remove-redundant-non-zero-and-overfl.patch')
| -rw-r--r-- | meta-amd-bsp/recipes-kernel/linux-4.19/linux-yocto-4.19.8/0054-drm-amd-display-Remove-redundant-non-zero-and-overfl.patch | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux-4.19/linux-yocto-4.19.8/0054-drm-amd-display-Remove-redundant-non-zero-and-overfl.patch b/meta-amd-bsp/recipes-kernel/linux-4.19/linux-yocto-4.19.8/0054-drm-amd-display-Remove-redundant-non-zero-and-overfl.patch new file mode 100644 index 00000000..5048f3be --- /dev/null +++ b/meta-amd-bsp/recipes-kernel/linux-4.19/linux-yocto-4.19.8/0054-drm-amd-display-Remove-redundant-non-zero-and-overfl.patch @@ -0,0 +1,46 @@ +From a6a2b0318ce45ff7d1fac4b689f5f5080c0f54cc Mon Sep 17 00:00:00 2001 +From: "Leo (Sunpeng) Li" <sunpeng.li@amd.com> +Date: Wed, 1 Aug 2018 10:20:53 -0400 +Subject: [PATCH 0054/2940] drm/amd/display: Remove redundant non-zero and + overflow check + +[Why] +Unsigned int is guaranteed to be >= 0, and read_channel_reply checks for +overflows. read_channel_reply also returns -1 on error, which is what +dc_link_aux_transfer is expected to return on error. + +[How] +Remove the if-statement. Return result of read_channel_reply directly. + +Signed-off-by: Leo (Sunpeng) Li <sunpeng.li@amd.com> +Reviewed-by: Mikita Lipski <Mikita.Lipski@amd.com> +Acked-by: Leo Li <sunpeng.li@amd.com> +Signed-off-by: Alex Deucher <alexander.deucher@amd.com> +--- + drivers/gpu/drm/amd/display/dc/core/dc_link_ddc.c | 10 +++------- + 1 file changed, 3 insertions(+), 7 deletions(-) + +diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_ddc.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_ddc.c +index 8def0d9fa0ff..506a97e16956 100644 +--- a/drivers/gpu/drm/amd/display/dc/core/dc_link_ddc.c ++++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_ddc.c +@@ -666,13 +666,9 @@ int dc_link_aux_transfer(struct ddc_service *ddc, + + switch (operation_result) { + case AUX_CHANNEL_OPERATION_SUCCEEDED: +- res = returned_bytes; +- +- if (res <= size && res >= 0) +- res = aux_engine->funcs->read_channel_reply(aux_engine, size, +- buffer, reply, +- &status); +- ++ res = aux_engine->funcs->read_channel_reply(aux_engine, size, ++ buffer, reply, ++ &status); + break; + case AUX_CHANNEL_OPERATION_FAILED_HPD_DISCON: + res = 0; +-- +2.17.1 + |