From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AC8B015A856; Thu, 13 Feb 2025 15:30:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739460602; cv=none; b=E6xkq6ig2mSHL0QQH5LPj5X8HLC9tRdvVS3Xc8iOExYA/tF3MuCbOeyiwoFkLsXAaJeB3z0rxPVNgH7QC/Ept3DvWL7d4Taw+u5mIO1A7nrNe6hRZr8u8Pjn+j07boXSa78uJaYNGujexBsoIefH4Q+K9TdCkURtVRyNLBKe0SU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739460602; c=relaxed/simple; bh=vQ1iV9FVKAPO8xe/T/fDvNpNGNwyvpsiRFcanTJ8lGY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=GasF1pCwXUmxYd3vEyFWGAo6aidnAY6G+nLEqsFbKLuMUlE9moaD/jK88lMbX7pZDQXkl41Amn9bbcbP7wvZosBE38z/J/3L9xG6tHKJrJPbfvjr+zFIzwogPxRSnO8651dVMPMyQTrEoSwBDChdvJz9G66w18qPpAiPjjaF6YY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=S0Byv38F; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="S0Byv38F" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1D2AFC4CED1; Thu, 13 Feb 2025 15:30:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1739460602; bh=vQ1iV9FVKAPO8xe/T/fDvNpNGNwyvpsiRFcanTJ8lGY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=S0Byv38FPgaDj2NyNmzXqG7bNeSBLtgfyJ/LJyhYgpQWjdtt3uFwfSb0MisWnpDDU OlP7wb4E6OE78hxPyofKR45akEHOfnCIll2dUzSwBavlH7vPdErxZuGUkPFhHLKEun cKkpaMZqMzXTmw6oerZjx0ka0oYSz7WN7JY/mzCo= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Zijun Hu , Bjorn Helgaas , Frank Li Subject: [PATCH 6.6 159/273] PCI: endpoint: Finish virtual EP removal in pci_epf_remove_vepf() Date: Thu, 13 Feb 2025 15:28:51 +0100 Message-ID: <20250213142413.619740420@linuxfoundation.org> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250213142407.354217048@linuxfoundation.org> References: <20250213142407.354217048@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Zijun Hu commit 3b9f942eb21c92041905e3943a8d5177c9a9d89d upstream. When removing a virtual Endpoint, pci_epf_remove_vepf() failed to clear epf_vf->epf_pf, which caused a subsequent pci_epf_add_vepf() to incorrectly return -EBUSY: pci_epf_add_vepf(epf_pf, epf_vf) // add pci_epf_remove_vepf(epf_pf, epf_vf) // remove pci_epf_add_vepf(epf_pf, epf_vf) // add again, -EBUSY error Fix by clearing epf_vf->epf_pf in pci_epf_remove_vepf(). Link: https://lore.kernel.org/r/20241210-pci-epc-core_fix-v3-3-4d86dd573e4b@quicinc.com Fixes: 1cf362e907f3 ("PCI: endpoint: Add support to add virtual function in endpoint core") Signed-off-by: Zijun Hu Signed-off-by: Bjorn Helgaas Reviewed-by: Frank Li Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/pci/endpoint/pci-epf-core.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/pci/endpoint/pci-epf-core.c +++ b/drivers/pci/endpoint/pci-epf-core.c @@ -202,6 +202,7 @@ void pci_epf_remove_vepf(struct pci_epf mutex_lock(&epf_pf->lock); clear_bit(epf_vf->vfunc_no, &epf_pf->vfunction_num_map); + epf_vf->epf_pf = NULL; list_del(&epf_vf->list); mutex_unlock(&epf_pf->lock); }