linux-kernel - [PATCH 2/2] mmc: sdhci-pci-gli: GL9767: Fix low power mode in the SD Express process

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20241025060017.1663697-2-benchuanggli@gmail.com>
Date: Fri, 25 Oct 2024 14:00:17 +0800
From: Ben Chuang <benchuanggli@...il.com>
To: adrian.hunter@...el.com,
	ulf.hansson@...aro.org,
	victor.shih@...esyslogic.com.tw
Cc: greg.tu@...esyslogic.com.tw,
	ben.chuang@...esyslogic.com.tw,
	HL.Liu@...esyslogic.com.tw,
	Lucas.Lai@...esyslogic.com.tw,
	benchuanggli@...il.com,
	victorshihgli@...il.com,
	linux-mmc@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] mmc: sdhci-pci-gli: GL9767: Fix low power mode in the SD Express process

From: Ben Chuang <ben.chuang@...esyslogic.com.tw>

When starting the SD Express process, the low power negotiation mode will
be disabled, so we need to re-enable it after switching back to SD mode.

Fixes: 0e92aec2efa0 ("mmc: sdhci-pci-gli: Add support SD Express card for GL9767")
Signed-off-by: Ben Chuang <benchuanggli@...il.com>
Signed-off-by: Ben Chuang <ben.chuang@...esyslogic.com.tw>
---
 drivers/mmc/host/sdhci-pci-gli.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/mmc/host/sdhci-pci-gli.c b/drivers/mmc/host/sdhci-pci-gli.c
index 22a927ce2c88..68ce4920e01e 100644
--- a/drivers/mmc/host/sdhci-pci-gli.c
+++ b/drivers/mmc/host/sdhci-pci-gli.c
@@ -1068,6 +1068,9 @@ static int gl9767_init_sd_express(struct mmc_host *mmc, struct mmc_ios *ios)
 		sdhci_writew(host, value, SDHCI_CLOCK_CONTROL);
 	}
 
+	pci_read_config_dword(pdev, PCIE_GLI_9767_CFG, &value);
+	value &= ~PCIE_GLI_9767_CFG_LOW_PWR_OFF;
+	pci_write_config_dword(pdev, PCIE_GLI_9767_CFG, value);
 	gl9767_vhs_read(pdev);
 
 	return 0;
-- 
2.47.0