sd: Avoid sending medium write commands if device is write protected
The SYNCHRONIZE_CACHE command is a medium write command and hence can fail when the device is write protected. Avoid sending such commands by making sure that write-cache-enable is disabled even though the device claim to support it. Signed-off-by: Sujit Reddy Thumma <sthumma@codeaurora.org> Signed-off-by: Dolev Raviv <draviv@codeaurora.org> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Reviewed-by: Venkatesh Srinivas <venkateshs@google.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
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