From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Message-Id: <20120217005537.481711015@linuxfoundation.org> Date: Thu, 16 Feb 2012 16:56:00 -0800 From: Greg KH To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: torvalds@linux-foundation.org, akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, Ludovic Desroches , Nicolas Ferre , Chris Ball Subject: [26/28] mmc: atmel-mci: save and restore sdioirq when soft reset is performed In-Reply-To: <20120217005609.GA17081@kroah.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.2-stable review patch. If anyone has any objections, please let me know. ------------------ From: Ludovic Desroches commit 18ee684b8ab666329e0a0a72d8b70f16fb0e2243 upstream. Sometimes a software reset is needed. Then some registers are saved and restored but the interrupt mask register is missing. It causes issues with sdio devices whose interrupts are masked after reset. Signed-off-by: Ludovic Desroches Signed-off-by: Nicolas Ferre Signed-off-by: Chris Ball Signed-off-by: Greg Kroah-Hartman --- drivers/mmc/host/atmel-mci.c | 3 +++ 1 file changed, 3 insertions(+) --- a/drivers/mmc/host/atmel-mci.c +++ b/drivers/mmc/host/atmel-mci.c @@ -965,11 +965,14 @@ static void atmci_start_request(struct a host->data_status = 0; if (host->need_reset) { + iflags = atmci_readl(host, ATMCI_IMR); + iflags &= (ATMCI_SDIOIRQA | ATMCI_SDIOIRQB); atmci_writel(host, ATMCI_CR, ATMCI_CR_SWRST); atmci_writel(host, ATMCI_CR, ATMCI_CR_MCIEN); atmci_writel(host, ATMCI_MR, host->mode_reg); if (host->caps.has_cfg_reg) atmci_writel(host, ATMCI_CFG, host->cfg_reg); + atmci_writel(host, ATMCI_IER, iflags); host->need_reset = false; } atmci_writel(host, ATMCI_SDCR, slot->sdc_reg);