* [PATCH 2/8] ufs: ufs-qcom: Fix race conditions caused by func ufs_qcom_testbus_config [not found] <1596204478-5420-1-git-send-email-cang@codeaurora.org> @ 2020-07-31 14:07 ` Can Guo 2020-07-31 14:07 ` [PATCH 3/8] scsi: ufs-qcom: Remove testbus dump in ufs_qcom_dump_dbg_regs Can Guo 1 sibling, 0 replies; 3+ messages in thread From: Can Guo @ 2020-07-31 14:07 UTC (permalink / raw) To: asutoshd, nguyenb, hongwus, rnayak, linux-scsi, kernel-team, saravanak, salyzyn, cang Cc: Andy Gross, Bjorn Andersson, Alim Akhtar, Avri Altman, James E.J. Bottomley, Martin K. Petersen, open list:ARM/QUALCOMM SUPPORT, open list If ufs_qcom_dump_dbg_regs() calls ufs_qcom_testbus_config() from ufshcd_suspend/resume and/or clk gate/ungate context, pm_runtime_get_sync() and ufshcd_hold() will cause racing problems. Fix this by removing the unnecessary calls of pm_runtime_get_sync() and ufshcd_hold(). Signed-off-by: Can Guo <cang@codeaurora.org> Reviewed-by: Hongwu Su <hongwus@codeaurora.org> Reviewed-by: Avri Altman <avri.altman@wdc.com> Reviewed-by: Bean Huo <beanhuo@micron.com> diff --git a/drivers/scsi/ufs/ufs-qcom.c b/drivers/scsi/ufs/ufs-qcom.c index 2e6ddb5..7da27ee 100644 --- a/drivers/scsi/ufs/ufs-qcom.c +++ b/drivers/scsi/ufs/ufs-qcom.c @@ -1604,9 +1604,6 @@ int ufs_qcom_testbus_config(struct ufs_qcom_host *host) */ } mask <<= offset; - - pm_runtime_get_sync(host->hba->dev); - ufshcd_hold(host->hba, false); ufshcd_rmwl(host->hba, TEST_BUS_SEL, (u32)host->testbus.select_major << 19, REG_UFS_CFG1); @@ -1619,8 +1616,6 @@ int ufs_qcom_testbus_config(struct ufs_qcom_host *host) * committed before returning. */ mb(); - ufshcd_release(host->hba); - pm_runtime_put_sync(host->hba->dev); return 0; } -- Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project. ^ permalink raw reply related [flat|nested] 3+ messages in thread
* [PATCH 3/8] scsi: ufs-qcom: Remove testbus dump in ufs_qcom_dump_dbg_regs [not found] <1596204478-5420-1-git-send-email-cang@codeaurora.org> 2020-07-31 14:07 ` [PATCH 2/8] ufs: ufs-qcom: Fix race conditions caused by func ufs_qcom_testbus_config Can Guo @ 2020-07-31 14:07 ` Can Guo 1 sibling, 0 replies; 3+ messages in thread From: Can Guo @ 2020-07-31 14:07 UTC (permalink / raw) To: asutoshd, nguyenb, hongwus, rnayak, linux-scsi, kernel-team, saravanak, salyzyn, cang Cc: Andy Gross, Bjorn Andersson, Alim Akhtar, Avri Altman, James E.J. Bottomley, Martin K. Petersen, open list:ARM/QUALCOMM SUPPORT, open list Dumping testbus registers is heavy enough to cause stability issues sometime, just remove them as of now. Signed-off-by: Can Guo <cang@codeaurora.org> Reviewed-by: Hongwu Su <hongwus@codeaurora.org> Reviewed-by: Avri Altman <avri.altman@wdc.com> Reviewed-by: Bean Huo <beanhuo@micron.com> diff --git a/drivers/scsi/ufs/ufs-qcom.c b/drivers/scsi/ufs/ufs-qcom.c index 7da27ee..96e0999 100644 --- a/drivers/scsi/ufs/ufs-qcom.c +++ b/drivers/scsi/ufs/ufs-qcom.c @@ -1620,44 +1620,12 @@ int ufs_qcom_testbus_config(struct ufs_qcom_host *host) return 0; } -static void ufs_qcom_testbus_read(struct ufs_hba *hba) -{ - ufshcd_dump_regs(hba, UFS_TEST_BUS, 4, "UFS_TEST_BUS "); -} - -static void ufs_qcom_print_unipro_testbus(struct ufs_hba *hba) -{ - struct ufs_qcom_host *host = ufshcd_get_variant(hba); - u32 *testbus = NULL; - int i, nminor = 256, testbus_len = nminor * sizeof(u32); - - testbus = kmalloc(testbus_len, GFP_KERNEL); - if (!testbus) - return; - - host->testbus.select_major = TSTBUS_UNIPRO; - for (i = 0; i < nminor; i++) { - host->testbus.select_minor = i; - ufs_qcom_testbus_config(host); - testbus[i] = ufshcd_readl(hba, UFS_TEST_BUS); - } - print_hex_dump(KERN_ERR, "UNIPRO_TEST_BUS ", DUMP_PREFIX_OFFSET, - 16, 4, testbus, testbus_len, false); - kfree(testbus); -} - static void ufs_qcom_dump_dbg_regs(struct ufs_hba *hba) { ufshcd_dump_regs(hba, REG_UFS_SYS1CLK_1US, 16 * 4, "HCI Vendor Specific Registers "); - /* sleep a bit intermittently as we are dumping too much data */ ufs_qcom_print_hw_debug_reg_all(hba, NULL, ufs_qcom_dump_regs_wrapper); - udelay(1000); - ufs_qcom_testbus_read(hba); - udelay(1000); - ufs_qcom_print_unipro_testbus(hba); - udelay(1000); } /** -- Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project. ^ permalink raw reply related [flat|nested] 3+ messages in thread
[parent not found: <1596182890-10086-1-git-send-email-cang@codeaurora.org>]
* [PATCH 3/8] scsi: ufs-qcom: Remove testbus dump in ufs_qcom_dump_dbg_regs [not found] <1596182890-10086-1-git-send-email-cang@codeaurora.org> @ 2020-07-31 8:08 ` Can Guo 0 siblings, 0 replies; 3+ messages in thread From: Can Guo @ 2020-07-31 8:08 UTC (permalink / raw) To: asutoshd, nguyenb, hongwus, rnayak, linux-scsi, kernel-team, saravanak, salyzyn, cang Cc: Andy Gross, Bjorn Andersson, Alim Akhtar, Avri Altman, James E.J. Bottomley, Martin K. Petersen, open list:ARM/QUALCOMM SUPPORT, open list Dumping testbus registers is heavy enough to cause stability issues sometime, just remove them as of now. Signed-off-by: Can Guo <cang@codeaurora.org> Reviewed-by: Hongwu Su <hongwus@codeaurora.org> Reviewed-by: Avri Altman <avri.altman@wdc.com> Reviewed-by: Bean Huo <beanhuo@micron.com> diff --git a/drivers/scsi/ufs/ufs-qcom.c b/drivers/scsi/ufs/ufs-qcom.c index 7da27ee..96e0999 100644 --- a/drivers/scsi/ufs/ufs-qcom.c +++ b/drivers/scsi/ufs/ufs-qcom.c @@ -1620,44 +1620,12 @@ int ufs_qcom_testbus_config(struct ufs_qcom_host *host) return 0; } -static void ufs_qcom_testbus_read(struct ufs_hba *hba) -{ - ufshcd_dump_regs(hba, UFS_TEST_BUS, 4, "UFS_TEST_BUS "); -} - -static void ufs_qcom_print_unipro_testbus(struct ufs_hba *hba) -{ - struct ufs_qcom_host *host = ufshcd_get_variant(hba); - u32 *testbus = NULL; - int i, nminor = 256, testbus_len = nminor * sizeof(u32); - - testbus = kmalloc(testbus_len, GFP_KERNEL); - if (!testbus) - return; - - host->testbus.select_major = TSTBUS_UNIPRO; - for (i = 0; i < nminor; i++) { - host->testbus.select_minor = i; - ufs_qcom_testbus_config(host); - testbus[i] = ufshcd_readl(hba, UFS_TEST_BUS); - } - print_hex_dump(KERN_ERR, "UNIPRO_TEST_BUS ", DUMP_PREFIX_OFFSET, - 16, 4, testbus, testbus_len, false); - kfree(testbus); -} - static void ufs_qcom_dump_dbg_regs(struct ufs_hba *hba) { ufshcd_dump_regs(hba, REG_UFS_SYS1CLK_1US, 16 * 4, "HCI Vendor Specific Registers "); - /* sleep a bit intermittently as we are dumping too much data */ ufs_qcom_print_hw_debug_reg_all(hba, NULL, ufs_qcom_dump_regs_wrapper); - udelay(1000); - ufs_qcom_testbus_read(hba); - udelay(1000); - ufs_qcom_print_unipro_testbus(hba); - udelay(1000); } /** -- Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project. ^ permalink raw reply related [flat|nested] 3+ messages in thread
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2020-07-31 14:07 ` [PATCH 2/8] ufs: ufs-qcom: Fix race conditions caused by func ufs_qcom_testbus_config Can Guo
2020-07-31 14:07 ` [PATCH 3/8] scsi: ufs-qcom: Remove testbus dump in ufs_qcom_dump_dbg_regs Can Guo
[not found] <1596182890-10086-1-git-send-email-cang@codeaurora.org>
2020-07-31 8:08 ` Can Guo
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