From mboxrd@z Thu Jan 1 00:00:00 1970 From: Kishon Vijay Abraham I Subject: [PATCH 05/18] PCI: endpoint: functions/pci-epf-test: Add "volatile" to pci_epf_test_reg Date: Fri, 18 Aug 2017 20:27:57 +0530 Message-ID: <20170818145810.17649-6-kishon@ti.com> References: <20170818145810.17649-1-kishon@ti.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <20170818145810.17649-1-kishon@ti.com> Sender: linux-kernel-owner@vger.kernel.org To: Bjorn Helgaas Cc: Joao Pinto , Arnd Bergmann , gregkh@linuxfoundation.org, kishon@ti.com, nsekhar@ti.com, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org List-Id: linux-omap@vger.kernel.org struct pci_epf_test_reg is the MEMSPACE of pci-epf-test function driver that will be accessed by the "host" for programming the pci-epf-test device. So this structure shouldn't be subjected to compiler optimization in pci_epf_test_cmd_handler() since the values can be changed by code outside the scope of current code at any time. Signed-off-by: Kishon Vijay Abraham I Signed-off-by: Sekhar Nori --- drivers/pci/endpoint/functions/pci-epf-test.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/pci/endpoint/functions/pci-epf-test.c b/drivers/pci/endpoint/functions/pci-epf-test.c index 53fff8030337..5cbc05a0762d 100644 --- a/drivers/pci/endpoint/functions/pci-epf-test.c +++ b/drivers/pci/endpoint/functions/pci-epf-test.c @@ -267,7 +267,7 @@ static void pci_epf_test_cmd_handler(struct work_struct *work) cmd_handler.work); struct pci_epf *epf = epf_test->epf; struct pci_epc *epc = epf->epc; - struct pci_epf_test_reg *reg = epf_test->reg[0]; + volatile struct pci_epf_test_reg *reg = epf_test->reg[0]; if (!reg->command) goto reset_handler; -- 2.11.0