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Revert "drm/amdgpu: Fix NULL dereference in dpm sysfs handlers"

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commit 87004abfbc upstream.

This regressed some working configurations so revert it.  Will
fix this properly for 5.9 and backport then.

This reverts commit 38e0c89a19.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alex Deucher 2020-07-30 11:02:30 -04:00 committed by Greg Kroah-Hartman
parent 2fdddd5914
commit 7b88c1ef51
1 changed files with 6 additions and 3 deletions
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9
drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
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@ -529,7 +529,8 @@ static ssize_t amdgpu_set_pp_od_clk_voltage(struct device *dev,
while (isspace(*++tmp_str));
while ((sub_str = strsep(&tmp_str, delimiter)) != NULL) {
while (tmp_str[0]) {
sub_str = strsep(&tmp_str, delimiter);
ret = kstrtol(sub_str, 0, &parameter[parameter_size]);
if (ret)
return -EINVAL;
@ -629,7 +630,8 @@ static ssize_t amdgpu_read_mask(const char *buf, size_t count, uint32_t *mask)
memcpy(buf_cpy, buf, bytes);
buf_cpy[bytes] = '\0';
tmp = buf_cpy;
while ((sub_str = strsep(&tmp, delimiter)) != NULL) {
while (tmp[0]) {
sub_str = strsep(&tmp, delimiter);
if (strlen(sub_str)) {
ret = kstrtol(sub_str, 0, &level);
if (ret)
@ -880,7 +882,8 @@ static ssize_t amdgpu_set_pp_power_profile_mode(struct device *dev,
i++;
memcpy(buf_cpy, buf, count-i);
tmp_str = buf_cpy;
while ((sub_str = strsep(&tmp_str, delimiter)) != NULL) {
while (tmp_str[0]) {
sub_str = strsep(&tmp_str, delimiter);
ret = kstrtol(sub_str, 0, &parameter[parameter_size]);
if (ret) {
count = -EINVAL;