(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux

net: ipa: balance runtime PM reference on remove error

ipa_remove() takes a runtime PM reference before accessing IPA hardware during teardown. If a concurrent modem start or stop keeps ipa_modem_stop() busy across both attempts, the callback intentionally returns without releasing the remaining resources because proceeding with teardown could crash. That return also skips the matching pm_runtime_put_noidle(), leaving the callback's usage-count reference held. Drop only this runtime PM reference before returning. pm_runtime_put_noidle() does not request an idle transition, so the hardware and resources retained on this exceptional path remain untouched while the usage count stays balanced. This issue was found by a static analysis checker and confirmed by manual source review. Fixes: 923a6b698447 ("net: ipa: get clock in ipa_probe()") Signed-off-by: Ruoyu Wang <ruoyuw560@gmail.com> Reviewed-by: Alex Elder <elder@riscstar.com> Link: https://patch.msgid.link/20260815151737.3758320-1-ruoyuw560@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>


Author Ruoyu Wang Committer Jakub Kicinski Date Commit Parent a4d7fc32
+3 -3
1 changed file
+3 -3
1 changed file