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Date: Fri, 5 Dec 2014 14:44:17 -0800 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Mark Lehrer <lehrer@...il.com>, Bart Van Assche <bvanassche@....org>, Sagi Grimberg <sagig@...lanox.com>, Nicholas Bellinger <nab@...ux-iscsi.org> Subject: [PATCH 3.17 083/122] srp-target: Retry when QP creation fails with ENOMEM 3.17-stable review patch. If anyone has any objections, please let me know. ------------------ From: Bart Van Assche <bvanassche@....org> commit ab477c1ff5e0a744c072404bf7db51bfe1f05b6e upstream. It is not guaranteed to that srp_sq_size is supported by the HCA. So if we failed to create the QP with ENOMEM, try with a smaller srp_sq_size. Keep it up until we hit MIN_SRPT_SQ_SIZE, then fail the connection. Reported-by: Mark Lehrer <lehrer@...il.com> Signed-off-by: Bart Van Assche <bvanassche@....org> Signed-off-by: Sagi Grimberg <sagig@...lanox.com> Signed-off-by: Nicholas Bellinger <nab@...ux-iscsi.org> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> --- drivers/infiniband/ulp/srpt/ib_srpt.c | 8 ++++++++ 1 file changed, 8 insertions(+) --- a/drivers/infiniband/ulp/srpt/ib_srpt.c +++ b/drivers/infiniband/ulp/srpt/ib_srpt.c @@ -2092,6 +2092,7 @@ static int srpt_create_ch_ib(struct srpt if (!qp_init) goto out; +retry: ch->cq = ib_create_cq(sdev->device, srpt_completion, NULL, ch, ch->rq_size + srp_sq_size, 0); if (IS_ERR(ch->cq)) { @@ -2115,6 +2116,13 @@ static int srpt_create_ch_ib(struct srpt ch->qp = ib_create_qp(sdev->pd, qp_init); if (IS_ERR(ch->qp)) { ret = PTR_ERR(ch->qp); + if (ret == -ENOMEM) { + srp_sq_size /= 2; + if (srp_sq_size >= MIN_SRPT_SQ_SIZE) { + ib_destroy_cq(ch->cq); + goto retry; + } + } printk(KERN_ERR "failed to create_qp ret= %d\n", ret); goto err_destroy_cq; } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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