From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from ale.deltatee.com ([207.54.116.67]:49778 "EHLO ale.deltatee.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1952423AbdDYSVZ (ORCPT ); Tue, 25 Apr 2017 14:21:25 -0400 From: Logan Gunthorpe To: linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org, linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, linux-raid@vger.kernel.org, linux-mmc@vger.kernel.org, linux-nvdimm@lists.01.org, linux-scsi@vger.kernel.org, open-iscsi@googlegroups.com, megaraidlinux.pdl@broadcom.com, sparmaintainer@unisys.com, devel@driverdev.osuosl.org, target-devel@vger.kernel.org, netdev@vger.kernel.org, linux-rdma@vger.kernel.org, dm-devel@redhat.com Cc: Christoph Hellwig , "Martin K. Petersen" , "James E.J. Bottomley" , Jens Axboe , Greg Kroah-Hartman , Dan Williams , Ross Zwisler , Matthew Wilcox , Sumit Semwal , Stephen Bates , Logan Gunthorpe , Adrian Hunter , Ulf Hansson Date: Tue, 25 Apr 2017 12:21:03 -0600 Message-Id: <1493144468-22493-17-git-send-email-logang@deltatee.com> In-Reply-To: <1493144468-22493-1-git-send-email-logang@deltatee.com> References: <1493144468-22493-1-git-send-email-logang@deltatee.com> Subject: [PATCH v2 16/21] mmc: sdhci: Make use of the new sg_map helper function Sender: linux-media-owner@vger.kernel.org List-ID: Straightforward conversion, except due to the lack of an error path we have to use SG_MAP_MUST_NOT_FAIL which may BUG_ON in certain cases in the future. Signed-off-by: Logan Gunthorpe Cc: Adrian Hunter Cc: Ulf Hansson --- drivers/mmc/host/sdhci.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-) diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index ecd0d43..239507f 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -513,15 +513,19 @@ static int sdhci_pre_dma_transfer(struct sdhci_host *host, return sg_count; } +/* + * Note this function may return PTR_ERR and must be checked. + */ static char *sdhci_kmap_atomic(struct scatterlist *sg, unsigned long *flags) { local_irq_save(*flags); - return kmap_atomic(sg_page(sg)) + sg->offset; + return sg_map(sg, 0, SG_KMAP_ATOMIC | SG_MAP_MUST_NOT_FAIL); } -static void sdhci_kunmap_atomic(void *buffer, unsigned long *flags) +static void sdhci_kunmap_atomic(struct scatterlist *sg, void *buffer, + unsigned long *flags) { - kunmap_atomic(buffer); + sg_unmap(sg, buffer, 0, SG_KMAP_ATOMIC); local_irq_restore(*flags); } @@ -585,7 +589,7 @@ static void sdhci_adma_table_pre(struct sdhci_host *host, if (data->flags & MMC_DATA_WRITE) { buffer = sdhci_kmap_atomic(sg, &flags); memcpy(align, buffer, offset); - sdhci_kunmap_atomic(buffer, &flags); + sdhci_kunmap_atomic(sg, buffer, &flags); } /* tran, valid */ @@ -663,7 +667,7 @@ static void sdhci_adma_table_post(struct sdhci_host *host, buffer = sdhci_kmap_atomic(sg, &flags); memcpy(buffer, align, size); - sdhci_kunmap_atomic(buffer, &flags); + sdhci_kunmap_atomic(sg, buffer, &flags); align += SDHCI_ADMA2_ALIGN; } -- 2.1.4