From: Neil Armstrong Date: Mon, 26 Apr 2021 17:55:58 +0000 (+0200) Subject: mmc: meson-gx: make replace WARN_ONCE with dev_warn_once about scatterlist offset... X-Git-Tag: v5.13-rc3~15^2~2 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=cabb1bb60e88ccaaa122ba01862403cd44e8e8f8;p=thirdparty%2Fkernel%2Flinux.git mmc: meson-gx: make replace WARN_ONCE with dev_warn_once about scatterlist offset alignment Some drivers like ath10k can sometimg give an sg buffer with an offset whose alignment is not compatible with the Amlogic DMA descriptor engine requirements. Simply replace with dev_warn_once() to inform user this should be fixed to avoid degraded performance. This should be ultimately fixed in ath10k, but since it's only a performance issue the warning should be removed. Fixes: 79ed05e329c3 ("mmc: meson-gx: add support for descriptor chain mode") Cc: stable@vger.kernel.org Reported-by: Christian Hewitt Signed-off-by: Neil Armstrong Acked-by: Martin Blumenstingl Link: https://lore.kernel.org/r/20210426175559.3110575-1-narmstrong@baylibre.com Signed-off-by: Ulf Hansson --- diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c index b8b771b643cc8..1c61f0f24c09b 100644 --- a/drivers/mmc/host/meson-gx-mmc.c +++ b/drivers/mmc/host/meson-gx-mmc.c @@ -258,7 +258,9 @@ static void meson_mmc_get_transfer_mode(struct mmc_host *mmc, for_each_sg(data->sg, sg, data->sg_len, i) { /* check for 8 byte alignment */ if (sg->offset % 8) { - WARN_ONCE(1, "unaligned scatterlist buffer\n"); + dev_warn_once(mmc_dev(mmc), + "unaligned sg offset %u, disabling descriptor DMA for transfer\n", + sg->offset); return; } }