5.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Mauro Carvalho Chehab mchehab+huawei@kernel.org
commit a4aebaf6e6efff548b01a3dc49b4b9074751c15b upstream.
When CONFIG_DVB_DYNAMIC_MINORS, ret is not initialized, and a semaphore is left at the wrong state, in case of errors.
Make the code simpler and avoid mistakes by having just one error check logic used weather DVB_DYNAMIC_MINORS is used or not.
Reported-by: kernel test robot lkp@intel.com Reported-by: Dan Carpenter dan.carpenter@linaro.org Closes: https://lore.kernel.org/r/202410201717.ULWWdJv8-lkp@intel.com/ Signed-off-by: Mauro Carvalho Chehab mchehab+huawei@kernel.org Link: https://lore.kernel.org/r/9e067488d8935b8cf00959764a1fa5de85d65725.173092625... Cc: Nathan Chancellor nathan@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/media/dvb-core/dvbdev.c | 15 ++++----------- 1 file changed, 4 insertions(+), 11 deletions(-)
--- a/drivers/media/dvb-core/dvbdev.c +++ b/drivers/media/dvb-core/dvbdev.c @@ -544,6 +544,9 @@ int dvb_register_device(struct dvb_adapt for (minor = 0; minor < MAX_DVB_MINORS; minor++) if (dvb_minors[minor] == NULL) break; +#else + minor = nums2minor(adap->num, type, id); +#endif if (minor >= MAX_DVB_MINORS) { if (new_node) { list_del (&new_node->list_head); @@ -557,17 +560,7 @@ int dvb_register_device(struct dvb_adapt mutex_unlock(&dvbdev_register_lock); return -EINVAL; } -#else - minor = nums2minor(adap->num, type, id); - if (minor >= MAX_DVB_MINORS) { - dvb_media_device_free(dvbdev); - list_del(&dvbdev->list_head); - kfree(dvbdev); - *pdvbdev = NULL; - mutex_unlock(&dvbdev_register_lock); - return ret; - } -#endif + dvbdev->minor = minor; dvb_minors[minor] = dvb_device_get(dvbdev); up_write(&minor_rwsem);