Merge branch 'upstream-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/linvil...

[pandora-kernel.git] / drivers / infiniband / ulp / srp / ib_srp.c

diff --git a/drivers/infiniband/ulp/srp/ib_srp.c b/drivers/infiniband/ulp/srp/ib_srp.c
index 4e22afe..8257d5a 100644 (file)
--- a/drivers/infiniband/ulp/srp/ib_srp.c
+++ b/drivers/infiniband/ulp/srp/ib_srp.c
@@ -77,6 +77,14 @@ MODULE_PARM_DESC(topspin_workarounds,
 
 static const u8 topspin_oui[3] = { 0x00, 0x05, 0xad };
 
+static int mellanox_workarounds = 1;
+
+module_param(mellanox_workarounds, int, 0444);
+MODULE_PARM_DESC(mellanox_workarounds,
+                "Enable workarounds for Mellanox SRP target bugs if != 0");
+
+static const u8 mellanox_oui[3] = { 0x00, 0x02, 0xc9 };
+
 static void srp_add_one(struct ib_device *device);
 static void srp_remove_one(struct ib_device *device);
 static void srp_completion(struct ib_cq *cq, void *target_ptr);
@@ -526,8 +534,10 @@ static int srp_reconnect_target(struct srp_target_port *target)
        while (ib_poll_cq(target->cq, 1, &wc) > 0)
                ; /* nothing */
 
+       spin_lock_irq(target->scsi_host->host_lock);
        list_for_each_entry_safe(req, tmp, &target->req_queue, list)
                srp_reset_req(target, req);
+       spin_unlock_irq(target->scsi_host->host_lock);
 
        target->rx_head  = 0;
        target->tx_head  = 0;
@@ -567,7 +577,7 @@ err:
        return ret;
 }
 
-static int srp_map_fmr(struct srp_device *dev, struct scatterlist *scat,
+static int srp_map_fmr(struct srp_target_port *target, struct scatterlist *scat,
                       int sg_cnt, struct srp_request *req,
                       struct srp_direct_buf *buf)
 {
@@ -577,10 +587,15 @@ static int srp_map_fmr(struct srp_device *dev, struct scatterlist *scat,
        int page_cnt;
        int i, j;
        int ret;
+       struct srp_device *dev = target->srp_host->dev;
 
        if (!dev->fmr_pool)
                return -ENODEV;
 
+       if ((sg_dma_address(&scat[0]) & ~dev->fmr_page_mask) &&
+           mellanox_workarounds && !memcmp(&target->ioc_guid, mellanox_oui, 3))
+               return -EINVAL;
+
        len = page_cnt = 0;
        for (i = 0; i < sg_cnt; ++i) {
                if (sg_dma_address(&scat[i]) & ~dev->fmr_page_mask) {
@@ -615,9 +630,10 @@ static int srp_map_fmr(struct srp_device *dev, struct scatterlist *scat,
                                (sg_dma_address(&scat[i]) & dev->fmr_page_mask) + j;
 
        req->fmr = ib_fmr_pool_map_phys(dev->fmr_pool,
-                                       dma_pages, page_cnt, &io_addr);
+                                       dma_pages, page_cnt, io_addr);
        if (IS_ERR(req->fmr)) {
                ret = PTR_ERR(req->fmr);
+               req->fmr = NULL;
                goto out;
        }
 
@@ -682,7 +698,7 @@ static int srp_map_data(struct scsi_cmnd *scmnd, struct srp_target_port *target,
                buf->va  = cpu_to_be64(sg_dma_address(scat));
                buf->key = cpu_to_be32(target->srp_host->dev->mr->rkey);
                buf->len = cpu_to_be32(sg_dma_len(scat));
-       } else if (srp_map_fmr(target->srp_host->dev, scat, count, req,
+       } else if (srp_map_fmr(target, scat, count, req,
                               (void *) cmd->add_data)) {
                /*
                 * FMR mapping failed, and the scatterlist has more