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Date: Tue, 7 Jun 2022 18:57:14 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Christoph Hellwig <hch@....de>, "Martin K. Petersen" <martin.petersen@...cle.com>, Chaitanya Kulkarni <kch@...dia.com>, Jens Axboe <axboe@...nel.dk>, Sasha Levin <sashal@...nel.org> Subject: [PATCH 5.18 316/879] target: remove an incorrect unmap zeroes data deduction From: Christoph Hellwig <hch@....de> [ Upstream commit 179d8609d8424529e95021df939ed7b0b82b37f1 ] For block devices, the SCSI target drivers implements UNMAP as calls to blkdev_issue_discard, which does not guarantee zeroing just because Write Zeroes is supported. Note that this does not affect the file backed path which uses fallocate to punch holes. Fixes: 2237498f0b5c ("target/iblock: Convert WRITE_SAME to blkdev_issue_zeroout") Signed-off-by: Christoph Hellwig <hch@....de> Reviewed-by: Martin K. Petersen <martin.petersen@...cle.com> Reviewed-by: Chaitanya Kulkarni <kch@...dia.com> Link: https://lore.kernel.org/r/20220415045258.199825-2-hch@lst.de Signed-off-by: Jens Axboe <axboe@...nel.dk> Signed-off-by: Sasha Levin <sashal@...nel.org> --- drivers/target/target_core_device.c | 1 - 1 file changed, 1 deletion(-) diff --git a/drivers/target/target_core_device.c b/drivers/target/target_core_device.c index 44bb380e7390..fa866acef5bb 100644 --- a/drivers/target/target_core_device.c +++ b/drivers/target/target_core_device.c @@ -850,7 +850,6 @@ bool target_configure_unmap_from_queue(struct se_dev_attrib *attrib, attrib->unmap_granularity = q->limits.discard_granularity / block_size; attrib->unmap_granularity_alignment = q->limits.discard_alignment / block_size; - attrib->unmap_zeroes_data = !!(q->limits.max_write_zeroes_sectors); return true; } EXPORT_SYMBOL(target_configure_unmap_from_queue); -- 2.35.1
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