From 88ea46bcbfd677b779897bbada32ec0709a6c92f Mon Sep 17 00:00:00 2001 From: Wolfram Sang Date: Mon, 9 May 2016 09:59:59 +0200 Subject: [PATCH] mmc: sdio: fall back to SDIO 1.0 for broken 1.1 cards I have two SDIO WLAN cards which specify being SDIO Rev. 1.1 cards but their FUNCE tuple reports the smaller size of a Rev 1.0 card. So, enforce 1.0 on these cards to avoid reading the not present registers. They are not really used anyhow. My cards initialize properly after this patch. Signed-off-by: Wolfram Sang Signed-off-by: Ulf Hansson --- drivers/mmc/core/sdio_cis.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/mmc/core/sdio_cis.c b/drivers/mmc/core/sdio_cis.c index 6f6fc527a263..dcb3dee59fa5 100644 --- a/drivers/mmc/core/sdio_cis.c +++ b/drivers/mmc/core/sdio_cis.c @@ -177,8 +177,13 @@ static int cistpl_funce_func(struct mmc_card *card, struct sdio_func *func, vsn = func->card->cccr.sdio_vsn; min_size = (vsn == SDIO_SDIO_REV_1_00) ? 28 : 42; - if (size < min_size) + if (size == 28 && vsn == SDIO_SDIO_REV_1_10) { + pr_warn("%s: card has broken SDIO 1.1 CIS, forcing SDIO 1.0\n", + mmc_hostname(card->host)); + vsn = SDIO_SDIO_REV_1_00; + } else if (size < min_size) { return -EINVAL; + } /* TPLFE_MAX_BLK_SIZE */ func->max_blksize = buf[12] | (buf[13] << 8); -- 2.20.1