linux-kernel - [PATCH AUTOSEL 5.4 20/21] scsi: sr: Don't use GFP

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Message-Id: <20220117170454.1472347-20-sashal@kernel.org>
Date:   Mon, 17 Jan 2022 12:04:52 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Christoph Hellwig <hch@....de>, Baoquan He <bhe@...hat.com>,
        "Martin K . Petersen" <martin.petersen@...cle.com>,
        Sasha Levin <sashal@...nel.org>, jejb@...ux.ibm.com,
        linux-scsi@...r.kernel.org
Subject: [PATCH AUTOSEL 5.4 20/21] scsi: sr: Don't use GFP_DMA

From: Christoph Hellwig <hch@....de>

[ Upstream commit d94d94969a4ba07a43d62429c60372320519c391 ]

The allocated buffers are used as a command payload, for which the block
layer and/or DMA API do the proper bounce buffering if needed.

Link: https://lore.kernel.org/r/20211222090842.920724-1-hch@lst.de
Reported-by: Baoquan He <bhe@...hat.com>
Reviewed-by: Baoquan He <bhe@...hat.com>
Signed-off-by: Christoph Hellwig <hch@....de>
Signed-off-by: Martin K. Petersen <martin.petersen@...cle.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/scsi/sr.c        | 2 +-
 drivers/scsi/sr_vendor.c | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c
index 279dea628620d..310da62cda263 100644
--- a/drivers/scsi/sr.c
+++ b/drivers/scsi/sr.c
@@ -887,7 +887,7 @@ static void get_capabilities(struct scsi_cd *cd)
 
 
 	/* allocate transfer buffer */
-	buffer = kmalloc(512, GFP_KERNEL | GFP_DMA);
+	buffer = kmalloc(512, GFP_KERNEL);
 	if (!buffer) {
 		sr_printk(KERN_ERR, cd, "out of memory.\n");
 		return;
diff --git a/drivers/scsi/sr_vendor.c b/drivers/scsi/sr_vendor.c
index b9db2ec6d0361..996bccadd3866 100644
--- a/drivers/scsi/sr_vendor.c
+++ b/drivers/scsi/sr_vendor.c
@@ -113,7 +113,7 @@ int sr_set_blocklength(Scsi_CD *cd, int blocklength)
 	if (cd->vendor == VENDOR_TOSHIBA)
 		density = (blocklength > 2048) ? 0x81 : 0x83;
 
-	buffer = kmalloc(512, GFP_KERNEL | GFP_DMA);
+	buffer = kmalloc(512, GFP_KERNEL);
 	if (!buffer)
 		return -ENOMEM;
 
@@ -161,7 +161,7 @@ int sr_cd_check(struct cdrom_device_info *cdi)
 	if (cd->cdi.mask & CDC_MULTI_SESSION)
 		return 0;
 
-	buffer = kmalloc(512, GFP_KERNEL | GFP_DMA);
+	buffer = kmalloc(512, GFP_KERNEL);
 	if (!buffer)
 		return -ENOMEM;
 
-- 
2.34.1