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For some nvme command, when issued by the nvme core layer, there is an internal buffer which can cause blk_rq_payload_bytes() to return a non-zero value yet there is no actual/real command payload and sg list. An example is the WRITE ZEROES command. To address this, when making choices on whether to dma map an sgl, use blk_rq_nr_phys_segments() instead of blk_rq_payload_bytes(). When there is a sgl, blk_rq_payload_bytes() will return the amount of data to be transferred by the sgl. Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Signed-off-by: James Smart <jsmart2021@gmail.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk> |
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.. | ||
core.c | ||
fabrics.c | ||
fabrics.h | ||
fault_inject.c | ||
fc.c | ||
Kconfig | ||
lightnvm.c | ||
Makefile | ||
multipath.c | ||
nvme.h | ||
pci.c | ||
rdma.c | ||
tcp.c | ||
trace.c | ||
trace.h |