iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

drm/amd/display: drop unnecessary NULL checks in debugfs

Browse Source 
pipe_ctx pointer cannot be NULL when getting the address of
an element of the pipe_ctx array. Moreover, the MAX_PIPES is
defined as 6, so pipe_ctx is not NULL after the loop either.

Detected using the static analysis tool - Svace.

Signed-off-by: Alexey Kodanev <aleksei.kodanev@bell-sw.com>
Signed-off-by: Hamza Mahfooz <hamza.mahfooz@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alexey Kodanev 2022-12-27 20:04:15 +03:00 committed by Alex Deucher
parent 4a1c9a444b
commit f8e12e770e
1 changed files with 16 additions and 56 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

72
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
View File

@ -1375,16 +1375,11 @@ static ssize_t dp_dsc_clock_en_read(struct file *f, char __user *buf,
for (i = 0; i < MAX_PIPES; i++) {
pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i];
if (pipe_ctx && pipe_ctx->stream &&
if (pipe_ctx->stream &&
pipe_ctx->stream->link == aconnector->dc_link)
break;
}
if (!pipe_ctx) {
kfree(rd_buf);
return -ENXIO;
}
dsc = pipe_ctx->stream_res.dsc;
if (dsc)
dsc->funcs->dsc_read_state(dsc, &dsc_state);
@ -1481,12 +1476,12 @@ static ssize_t dp_dsc_clock_en_write(struct file *f, const char __user *buf,
for (i = 0; i < MAX_PIPES; i++) {
pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i];
if (pipe_ctx && pipe_ctx->stream &&
if (pipe_ctx->stream &&
pipe_ctx->stream->link == aconnector->dc_link)
break;
}
if (!pipe_ctx || !pipe_ctx->stream)
if (!pipe_ctx->stream)
goto done;
// Get CRTC state
@ -1566,16 +1561,11 @@ static ssize_t dp_dsc_slice_width_read(struct file *f, char __user *buf,
for (i = 0; i < MAX_PIPES; i++) {
pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i];
if (pipe_ctx && pipe_ctx->stream &&
if (pipe_ctx->stream &&
pipe_ctx->stream->link == aconnector->dc_link)
break;
}
if (!pipe_ctx) {
kfree(rd_buf);
return -ENXIO;
}
dsc = pipe_ctx->stream_res.dsc;
if (dsc)
dsc->funcs->dsc_read_state(dsc, &dsc_state);
@ -1670,12 +1660,12 @@ static ssize_t dp_dsc_slice_width_write(struct file *f, const char __user *buf,
for (i = 0; i < MAX_PIPES; i++) {
pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i];
if (pipe_ctx && pipe_ctx->stream &&
if (pipe_ctx->stream &&
pipe_ctx->stream->link == aconnector->dc_link)
break;
}
if (!pipe_ctx || !pipe_ctx->stream)
if (!pipe_ctx->stream)
goto done;
// Safely get CRTC state
@ -1755,16 +1745,11 @@ static ssize_t dp_dsc_slice_height_read(struct file *f, char __user *buf,
for (i = 0; i < MAX_PIPES; i++) {
pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i];
if (pipe_ctx && pipe_ctx->stream &&
if (pipe_ctx->stream &&
pipe_ctx->stream->link == aconnector->dc_link)
break;
}
if (!pipe_ctx) {
kfree(rd_buf);
return -ENXIO;
}
dsc = pipe_ctx->stream_res.dsc;
if (dsc)
dsc->funcs->dsc_read_state(dsc, &dsc_state);
@ -1859,12 +1844,12 @@ static ssize_t dp_dsc_slice_height_write(struct file *f, const char __user *buf,
for (i = 0; i < MAX_PIPES; i++) {
pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i];
if (pipe_ctx && pipe_ctx->stream &&
if (pipe_ctx->stream &&
pipe_ctx->stream->link == aconnector->dc_link)
break;
}
if (!pipe_ctx || !pipe_ctx->stream)
if (!pipe_ctx->stream)
goto done;
// Get CRTC state
@ -1940,16 +1925,11 @@ static ssize_t dp_dsc_bits_per_pixel_read(struct file *f, char __user *buf,
for (i = 0; i < MAX_PIPES; i++) {
pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i];
if (pipe_ctx && pipe_ctx->stream &&
if (pipe_ctx->stream &&
pipe_ctx->stream->link == aconnector->dc_link)
break;
}
if (!pipe_ctx) {
kfree(rd_buf);
return -ENXIO;
}
dsc = pipe_ctx->stream_res.dsc;
if (dsc)
dsc->funcs->dsc_read_state(dsc, &dsc_state);
@ -2041,12 +2021,12 @@ static ssize_t dp_dsc_bits_per_pixel_write(struct file *f, const char __user *bu
for (i = 0; i < MAX_PIPES; i++) {
pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i];
if (pipe_ctx && pipe_ctx->stream &&
if (pipe_ctx->stream &&
pipe_ctx->stream->link == aconnector->dc_link)
break;
}
if (!pipe_ctx || !pipe_ctx->stream)
if (!pipe_ctx->stream)
goto done;
// Get CRTC state
@ -2120,16 +2100,11 @@ static ssize_t dp_dsc_pic_width_read(struct file *f, char __user *buf,
for (i = 0; i < MAX_PIPES; i++) {
pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i];
if (pipe_ctx && pipe_ctx->stream &&
if (pipe_ctx->stream &&
pipe_ctx->stream->link == aconnector->dc_link)
break;
}
if (!pipe_ctx) {
kfree(rd_buf);
return -ENXIO;
}
dsc = pipe_ctx->stream_res.dsc;
if (dsc)
dsc->funcs->dsc_read_state(dsc, &dsc_state);
@ -2181,16 +2156,11 @@ static ssize_t dp_dsc_pic_height_read(struct file *f, char __user *buf,
for (i = 0; i < MAX_PIPES; i++) {
pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i];
if (pipe_ctx && pipe_ctx->stream &&
if (pipe_ctx->stream &&
pipe_ctx->stream->link == aconnector->dc_link)
break;
}
if (!pipe_ctx) {
kfree(rd_buf);
return -ENXIO;
}
dsc = pipe_ctx->stream_res.dsc;
if (dsc)
dsc->funcs->dsc_read_state(dsc, &dsc_state);
@ -2257,16 +2227,11 @@ static ssize_t dp_dsc_chunk_size_read(struct file *f, char __user *buf,
for (i = 0; i < MAX_PIPES; i++) {
pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i];
if (pipe_ctx && pipe_ctx->stream &&
if (pipe_ctx->stream &&
pipe_ctx->stream->link == aconnector->dc_link)
break;
}
if (!pipe_ctx) {
kfree(rd_buf);
return -ENXIO;
}
dsc = pipe_ctx->stream_res.dsc;
if (dsc)
dsc->funcs->dsc_read_state(dsc, &dsc_state);
@ -2333,16 +2298,11 @@ static ssize_t dp_dsc_slice_bpg_offset_read(struct file *f, char __user *buf,
for (i = 0; i < MAX_PIPES; i++) {
pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i];
if (pipe_ctx && pipe_ctx->stream &&
if (pipe_ctx->stream &&
pipe_ctx->stream->link == aconnector->dc_link)
break;
}
if (!pipe_ctx) {
kfree(rd_buf);
return -ENXIO;
}
dsc = pipe_ctx->stream_res.dsc;
if (dsc)
dsc->funcs->dsc_read_state(dsc, &dsc_state);