Merge tag 'lsk-v3.10-android-14.11'

[firefly-linux-kernel-4.4.55.git] / drivers / scsi / scsi_lib.c

diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 86d522004a208255b17861b4c1cb556bbe7c973e..26b898182e8f1939056c6f7cc8715b03e79a674e 100644 (file)
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -815,6 +815,14 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes)
                        scsi_next_command(cmd);
                        return;
                }
+       } else if (blk_rq_bytes(req) == 0 && result && !sense_deferred) {
+               /*
+                * Certain non BLOCK_PC requests are commands that don't
+                * actually transfer anything (FLUSH), so cannot use
+                * good_bytes != blk_rq_bytes(req) as the signal for an error.
+                * This sets the error explicitly for the problem case.
+                */
+               error = __scsi_error_from_host_byte(cmd, result);
        }
 
        /* no bidi support for !REQ_TYPE_BLOCK_PC yet */
@@ -1668,7 +1676,7 @@ u64 scsi_calculate_bounce_limit(struct Scsi_Host *shost)
 
        host_dev = scsi_get_device(shost);
        if (host_dev && host_dev->dma_mask)
-               bounce_limit = *host_dev->dma_mask;
+               bounce_limit = (u64)dma_max_pfn(host_dev) << PAGE_SHIFT;
 
        return bounce_limit;
 }