[SCSI] bfa: Handle SCSI IO underrun case. (95aa060d) · Commits · 戴 / test

When IO is completed with underrun and with good SCSI status, check if the transferred bytes against scsi_cmnd->underflow, which is set to minimum number of bytes that must be transferred for this command, if is less than required minimum, complete the IO with DID_ERROR. Signed-off-by:

Krishna Gudipati <kgudipat@brocade.com> Signed-off-by:

James Bottomley <James.Bottomley@suse.de>

drivers/scsi/bfa/bfad_im.c

+12 −2

Original line number	Diff line number	Diff line
		@@ -43,11 +43,11 @@ bfa_cb_ioim_done(void drv, struct bfad_ioim_s dio,
		struct bfad_s *bfad = drv;
		struct bfad_itnim_data_s *itnim_data;
		struct bfad_itnim_s *itnim;
		u8 host_status = DID_OK;

		switch (io_status) {
		case BFI_IOIM_STS_OK:
		bfa_trc(bfad, scsi_status);
		cmnd->result = ScsiResult(DID_OK, scsi_status);
		scsi_set_resid(cmnd, 0);

		if (sns_len > 0) {
		@@ -56,8 +56,18 @@ bfa_cb_ioim_done(void drv, struct bfad_ioim_s dio,
		sns_len = SCSI_SENSE_BUFFERSIZE;
		memcpy(cmnd->sense_buffer, sns_info, sns_len);
		}
		if (residue > 0)
		if (residue > 0) {
		bfa_trc(bfad, residue);
		scsi_set_resid(cmnd, residue);
		if (!sns_len && (scsi_status == SAM_STAT_GOOD) &&
		(scsi_bufflen(cmnd) - residue) <
		cmnd->underflow) {
		bfa_trc(bfad, 0);
		host_status = DID_ERROR;
		}
		}
		cmnd->result = ScsiResult(host_status, scsi_status);

		break;

		case BFI_IOIM_STS_ABORTED:

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