[PATCH AUTOSEL 5.15 12/46] scsi: ufs: ufs-mediatek: Fix the timing of configuring device regulators

[PATCH AUTOSEL 5.15 12/46] scsi: ufs: ufs-mediatek: Fix the timing of configuring device regulators

[Sasha Levin]

From: Po-Wen Kao <powen.kao@mediatek.com>

[ Upstream commit 3fd23b8dfb54d9b74eba6dfdd3225db3ac116785 ]

Currently the LPM configurations of device regulators may not work since
VCC is not disabled yet while ufs_mtk_vreg_set_lpm() is executed.

Fix this by changing the timing of invoking ufs_mtk_vreg_set_lpm().

Link: https://lore.kernel.org/r/20220616053725.5681-5-stanley.chu@mediatek.com
Reviewed-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Po-Wen Kao <powen.kao@mediatek.com>
Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/scsi/ufs/ufs-mediatek.c | 58 ++++++++++++++++++++++++++++++---
 1 file changed, 53 insertions(+), 5 deletions(-)

diff --git a/drivers/scsi/ufs/ufs-mediatek.c b/drivers/scsi/ufs/ufs-mediatek.c
index 4e53857605de..9f1d69d33149 100644
--- a/drivers/scsi/ufs/ufs-mediatek.c
+++ b/drivers/scsi/ufs/ufs-mediatek.c
@@ -949,7 +949,6 @@ static int ufs_mtk_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op)
 		 * ufshcd_suspend() re-enabling regulators while vreg is still
 		 * in low-power mode.
 		 */
-		ufs_mtk_vreg_set_lpm(hba, true);
 		err = ufs_mtk_mphy_power_on(hba, false);
 		if (err)
 			goto fail;
@@ -973,12 +972,13 @@ static int ufs_mtk_resume(struct ufs_hba *hba, enum ufs_pm_op pm_op)
 {
 	int err;
 
+	if (hba->ufshcd_state != UFSHCD_STATE_OPERATIONAL)
+		ufs_mtk_vreg_set_lpm(hba, false);
+
 	err = ufs_mtk_mphy_power_on(hba, true);
 	if (err)
 		goto fail;
 
-	ufs_mtk_vreg_set_lpm(hba, false);
-
 	if (ufshcd_is_link_hibern8(hba)) {
 		err = ufs_mtk_link_set_hpm(hba);
 		if (err)
@@ -1139,9 +1139,57 @@ static int ufs_mtk_remove(struct platform_device *pdev)
 	return 0;
 }
 
+int ufs_mtk_system_suspend(struct device *dev)
+{
+	struct ufs_hba *hba = dev_get_drvdata(dev);
+	int ret;
+
+	ret = ufshcd_system_suspend(dev);
+	if (ret)
+		return ret;
+
+	ufs_mtk_vreg_set_lpm(hba, true);
+
+	return 0;
+}
+
+int ufs_mtk_system_resume(struct device *dev)
+{
+	struct ufs_hba *hba = dev_get_drvdata(dev);
+
+	ufs_mtk_vreg_set_lpm(hba, false);
+
+	return ufshcd_system_resume(dev);
+}
+
+int ufs_mtk_runtime_suspend(struct device *dev)
+{
+	struct ufs_hba *hba = dev_get_drvdata(dev);
+	int ret = 0;
+
+	ret = ufshcd_runtime_suspend(dev);
+	if (ret)
+		return ret;
+
+	ufs_mtk_vreg_set_lpm(hba, true);
+
+	return 0;
+}
+
+int ufs_mtk_runtime_resume(struct device *dev)
+{
+	struct ufs_hba *hba = dev_get_drvdata(dev);
+
+	ufs_mtk_vreg_set_lpm(hba, false);
+
+	return ufshcd_runtime_resume(dev);
+}
+
 static const struct dev_pm_ops ufs_mtk_pm_ops = {
-	SET_SYSTEM_SLEEP_PM_OPS(ufshcd_system_suspend, ufshcd_system_resume)
-	SET_RUNTIME_PM_OPS(ufshcd_runtime_suspend, ufshcd_runtime_resume, NULL)
+	SET_SYSTEM_SLEEP_PM_OPS(ufs_mtk_system_suspend,
+				ufs_mtk_system_resume)
+	SET_RUNTIME_PM_OPS(ufs_mtk_runtime_suspend,
+			   ufs_mtk_runtime_resume, NULL)
 	.prepare	 = ufshcd_suspend_prepare,
 	.complete	 = ufshcd_resume_complete,
 };
-- 
2.35.1

[PATCH AUTOSEL 5.15 21/46] scsi: lpfc: Prevent buffer overflow crashes in debugfs with malformed user input

[Sasha Levin]

From: James Smart <jsmart2021@gmail.com>

[ Upstream commit f8191d40aa612981ce897e66cda6a88db8df17bb ]

Malformed user input to debugfs results in buffer overflow crashes.  Adapt
input string lengths to fit within internal buffers, leaving space for NULL
terminators.

Link: https://lore.kernel.org/r/20220701211425.2708-3-jsmart2021@gmail.com
Co-developed-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/scsi/lpfc/lpfc_debugfs.c | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/drivers/scsi/lpfc/lpfc_debugfs.c b/drivers/scsi/lpfc/lpfc_debugfs.c
index 08b2e85dcd7d..79bc86ba59b3 100644
--- a/drivers/scsi/lpfc/lpfc_debugfs.c
+++ b/drivers/scsi/lpfc/lpfc_debugfs.c
@@ -2607,8 +2607,8 @@ lpfc_debugfs_multixripools_write(struct file *file, const char __user *buf,
 	struct lpfc_sli4_hdw_queue *qp;
 	struct lpfc_multixri_pool *multixri_pool;
 
-	if (nbytes > 64)
-		nbytes = 64;
+	if (nbytes > sizeof(mybuf) - 1)
+		nbytes = sizeof(mybuf) - 1;
 
 	memset(mybuf, 0, sizeof(mybuf));
 
@@ -2688,8 +2688,8 @@ lpfc_debugfs_nvmestat_write(struct file *file, const char __user *buf,
 	if (!phba->targetport)
 		return -ENXIO;
 
-	if (nbytes > 64)
-		nbytes = 64;
+	if (nbytes > sizeof(mybuf) - 1)
+		nbytes = sizeof(mybuf) - 1;
 
 	memset(mybuf, 0, sizeof(mybuf));
 
@@ -2826,8 +2826,8 @@ lpfc_debugfs_ioktime_write(struct file *file, const char __user *buf,
 	char mybuf[64];
 	char *pbuf;
 
-	if (nbytes > 64)
-		nbytes = 64;
+	if (nbytes > sizeof(mybuf) - 1)
+		nbytes = sizeof(mybuf) - 1;
 
 	memset(mybuf, 0, sizeof(mybuf));
 
@@ -2954,8 +2954,8 @@ lpfc_debugfs_nvmeio_trc_write(struct file *file, const char __user *buf,
 	char mybuf[64];
 	char *pbuf;
 
-	if (nbytes > 63)
-		nbytes = 63;
+	if (nbytes > sizeof(mybuf) - 1)
+		nbytes = sizeof(mybuf) - 1;
 
 	memset(mybuf, 0, sizeof(mybuf));
 
@@ -3060,8 +3060,8 @@ lpfc_debugfs_hdwqstat_write(struct file *file, const char __user *buf,
 	char *pbuf;
 	int i;
 
-	if (nbytes > 64)
-		nbytes = 64;
+	if (nbytes > sizeof(mybuf) - 1)
+		nbytes = sizeof(mybuf) - 1;
 
 	memset(mybuf, 0, sizeof(mybuf));
 
-- 
2.35.1

[PATCH AUTOSEL 5.15 22/46] scsi: lpfc: Fix possible memory leak when failing to issue CMF WQE

[Sasha Levin]

From: James Smart <jsmart2021@gmail.com>

[ Upstream commit 2f67dc7970bce3529edce93a0a14234d88b3fcd5 ]

There is no corresponding free routine if lpfc_sli4_issue_wqe fails to
issue the CMF WQE in lpfc_issue_cmf_sync_wqe.

If ret_val is non-zero, then free the iocbq request structure.

Link: https://lore.kernel.org/r/20220701211425.2708-6-jsmart2021@gmail.com
Co-developed-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/scsi/lpfc/lpfc_sli.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c
index d8d26cde70b6..d5a47fdf8650 100644
--- a/drivers/scsi/lpfc/lpfc_sli.c
+++ b/drivers/scsi/lpfc/lpfc_sli.c
@@ -2007,10 +2007,12 @@ lpfc_issue_cmf_sync_wqe(struct lpfc_hba *phba, u32 ms, u64 total)
 
 	sync_buf->iocb_flag |= LPFC_IO_CMF;
 	ret_val = lpfc_sli4_issue_wqe(phba, &phba->sli4_hba.hdwq[0], sync_buf);
-	if (ret_val)
+	if (ret_val) {
 		lpfc_printf_log(phba, KERN_INFO, LOG_CGN_MGMT,
 				"6214 Cannot issue CMF_SYNC_WQE: x%x\n",
 				ret_val);
+		__lpfc_sli_release_iocbq(phba, sync_buf);
+	}
 out_unlock:
 	spin_unlock_irqrestore(&phba->hbalock, iflags);
 	return ret_val;
-- 
2.35.1