Date: Mon, 28 Nov 2022 17:27:11 GMT From: "Bjoern A. Zeeb" <bz@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: 46c09d766d26 - stable/13 - iwlwifi: fix hang on unloading driver Message-ID: <202211281727.2ASHRBJ9081414@gitrepo.freebsd.org>
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The branch stable/13 has been updated by bz: URL: https://cgit.FreeBSD.org/src/commit/?id=46c09d766d265a886a7fd11ee5dd88bb17e9a0af commit 46c09d766d265a886a7fd11ee5dd88bb17e9a0af Author: Bjoern A. Zeeb <bz@FreeBSD.org> AuthorDate: 2022-11-22 17:29:41 +0000 Commit: Bjoern A. Zeeb <bz@FreeBSD.org> CommitDate: 2022-11-28 16:34:46 +0000 iwlwifi: fix hang on unloading driver f808c43ad9234670770601ba32a7426b00bbf528 introduced a FreeBSD specific behaviour to wait for firmware load completion before returning from loading the driver. This does no longer allow iwl_drv_stop to detect that startup has completed and it will wait indefinitely for a completion event that will not happen. We could change the complete() call to a complete_all() but to avoid confusion, future side effects, and for simplicity daisy-chain two complete events in FreeBSD. PR: 267869 Reported by: Peter Much (pmc citylink.dinoex.sub.org) Tested by: Peter Much (pmc citylink.dinoex.sub.org) Sponsored by: The FreeBSD Foundation (cherry picked from commit bee60c98974593d25aa18743f9413a78e0d57dc9) --- sys/contrib/dev/iwlwifi/iwl-drv.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/sys/contrib/dev/iwlwifi/iwl-drv.c b/sys/contrib/dev/iwlwifi/iwl-drv.c index 6daba537262b..cecbacbe62c2 100644 --- a/sys/contrib/dev/iwlwifi/iwl-drv.c +++ b/sys/contrib/dev/iwlwifi/iwl-drv.c @@ -77,6 +77,9 @@ struct iwl_drv { char firmware_name[64]; /* name of firmware file to load */ struct completion request_firmware_complete; +#if defined(__FreeBSD__) + struct completion drv_start_complete; +#endif #ifdef CONFIG_IWLWIFI_DEBUGFS struct dentry *dbgfs_drv; @@ -1736,6 +1739,9 @@ struct iwl_drv *iwl_drv_start(struct iwl_trans *trans) drv->dev = trans->dev; init_completion(&drv->request_firmware_complete); +#if defined(__FreeBSD__) + init_completion(&drv->drv_start_complete); +#endif INIT_LIST_HEAD(&drv->list); #ifdef CONFIG_IWLWIFI_DEBUGFS @@ -1763,6 +1769,7 @@ struct iwl_drv *iwl_drv_start(struct iwl_trans *trans) * returned before it was all done that is what could happen. */ wait_for_completion(&drv->request_firmware_complete); + complete(&drv->drv_start_complete); #endif return drv; @@ -1779,7 +1786,11 @@ err: void iwl_drv_stop(struct iwl_drv *drv) { +#if defined(__linux__) wait_for_completion(&drv->request_firmware_complete); +#elif defined(__FreeBSD__) + wait_for_completion(&drv->drv_start_complete); +#endif _iwl_op_mode_stop(drv);
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