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    Subject[PATCH 5.4 242/320] scsi: sr: Dont use GFP_DMA
    Date
    From: Christoph Hellwig <hch@lst.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@redhat.com>
    Reviewed-by: Baoquan He <bhe@redhat.com>
    Signed-off-by: Christoph Hellwig <hch@lst.de>
    Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
    Signed-off-by: Sasha Levin <sashal@kernel.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


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