Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753579AbZLARR0 (ORCPT ); Tue, 1 Dec 2009 12:17:26 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752915AbZLARRZ (ORCPT ); Tue, 1 Dec 2009 12:17:25 -0500 Received: from buzzloop.caiaq.de ([212.112.241.133]:43031 "EHLO buzzloop.caiaq.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752375AbZLARRX (ORCPT ); Tue, 1 Dec 2009 12:17:23 -0500 From: Daniel Mack To: linux-kernel@vger.kernel.org Cc: Daniel Mack , Pierre Ossman , Eric Miao , linux-mmc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, stable@kernel.org Subject: [PATCH] mmc: pxamci: call mmc_remove_host() before freeing resources Date: Tue, 1 Dec 2009 18:17:18 +0100 Message-Id: <1259687838-31722-1-git-send-email-daniel@caiaq.de> X-Mailer: git-send-email 1.6.5.2 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5465 Lines: 94 mmc_remove_host() will cause the mmc core to switch off the bus power by eventually calling pxamci_set_ios(). This function uses the regulator or the GPIO which have been freed already. This causes the following Oops on module unload. [ 49.519649] Unable to handle kernel paging request at virtual address 30303a70 [ 49.526878] pgd = c7084000 [ 49.529563] [30303a70] *pgd=00000000 [ 49.533136] Internal error: Oops: 5 [#1] [ 49.537025] last sysfs file: /sys/devices/platform/pxa27x-ohci/usb1/1-1/1-1:1.0/host0/target0:0:0/0:0:0:0/scsi_level [ 49.547471] Modules linked in: pxamci(-) eeti_ts [ 49.552061] CPU: 0 Not tainted (2.6.32-rc8 #322) [ 49.557001] PC is at regulator_is_enabled+0x3c/0xbc [ 49.561846] LR is at regulator_is_enabled+0x30/0xbc [ 49.566691] pc : [] lr : [] psr: 60000013 [ 49.566702] sp : c7083e70 ip : 30303a30 fp : 00000000 [ 49.578093] r10: c705e200 r9 : c7082000 r8 : c705e2e0 [ 49.583280] r7 : c7061340 r6 : c7061340 r5 : c7083e70 r4 : 00000000 [ 49.589759] r3 : c04dc434 r2 : c04dc434 r1 : c03eecea r0 : 00000047 [ 49.596241] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user [ 49.603329] Control: 0000397f Table: a7084018 DAC: 00000015 [ 49.609031] Process rmmod (pid: 1101, stack limit = 0xc7082278) [ 49.614908] Stack: (0xc7083e70 to 0xc7084000) [ 49.619238] 3e60: c7082000 c703c4f8 c705ea00 c04f4074 [ 49.627366] 3e80: 00000000 c705e3a0 ffffffff c0247ddc c70361a0 00000000 c705e3a0 ffffffff [ 49.635499] 3ea0: c705e200 bf006400 c78c4f00 c705e200 c705e3a0 ffffffff c705e200 ffffffff [ 49.643633] 3ec0: c04d8ac8 c02476d0 ffffffff c0247c60 c705e200 c0248678 c705e200 c0249064 [ 49.651765] 3ee0: ffffffff bf006204 c04d8ad0 c04d8ad0 c04d8ac8 bf007490 00000880 c00440c4 [ 49.659898] 3f00: 0000b748 c01c5708 bf007490 c01c44c8 c04d8ac8 c04d8afc bf007490 c01c4570 [ 49.668031] 3f20: bf007490 bf00750c c04f4258 c01c37a4 00000000 bf00750c c7083f44 c007b014 [ 49.676162] 3f40: 4000d000 6d617870 08006963 00000001 00000000 c7085000 00000001 00000000 [ 49.684287] 3f60: 4000d000 c7083f8c 00000001 bea01a54 00005401 c7ab1400 c00440c4 00082000 [ 49.692420] 3f80: bf00750c 00000880 c7083f8c 00000000 4000cfa8 00000000 00000880 bea01cc8 [ 49.700552] 3fa0: 00000081 c0043f40 00000000 00000880 bea01cc8 00000880 00000006 00000000 [ 49.708677] 3fc0: 00000000 00000880 bea01cc8 00000081 00000097 0000cca4 0000b748 00000000 [ 49.716802] 3fe0: 4001a4f0 bea01cc0 00018bf4 4001a4fc 20000010 bea01cc8 a063e021 a063e421 [ 49.724958] [] (regulator_is_enabled+0x3c/0xbc) from [] (mmc_regulator_set_ocr+0x14/0xd8) [ 49.734836] [] (mmc_regulator_set_ocr+0x14/0xd8) from [] (pxamci_set_ios+0xd8/0x17c [pxamci]) [ 49.745044] [] (pxamci_set_ios+0xd8/0x17c [pxamci]) from [] (mmc_power_off+0x50/0x58) [ 49.754555] [] (mmc_power_off+0x50/0x58) from [] (mmc_detach_bus+0x68/0xc4) [ 49.763207] [] (mmc_detach_bus+0x68/0xc4) from [] (mmc_stop_host+0xd4/0x1bc) [ 49.771944] [] (mmc_stop_host+0xd4/0x1bc) from [] (mmc_remove_host+0xc/0x20) [ 49.780681] [] (mmc_remove_host+0xc/0x20) from [] (pxamci_remove+0xc8/0x174 [pxamci]) [ 49.790211] [] (pxamci_remove+0xc8/0x174 [pxamci]) from [] (platform_drv_remove+0x1c/0x24) [ 49.800164] [] (platform_drv_remove+0x1c/0x24) from [] (__device_release_driver+0x7c/0xc4) [ 49.810110] [] (__device_release_driver+0x7c/0xc4) from [] (driver_detach+0x60/0x8c) [ 49.819535] [] (driver_detach+0x60/0x8c) from [] (bus_remove_driver+0x90/0xcc) [ 49.828452] [] (bus_remove_driver+0x90/0xcc) from [] (sys_delete_module+0x1d8/0x254) [ 49.837891] [] (sys_delete_module+0x1d8/0x254) from [] (ret_fast_syscall+0x0/0x28) [ 49.847145] Code: eb06c53a e596c030 e1a0500d e59f106c (e59c0040) [ 49.853566] ---[ end trace b5fa66a00cea142f ]--- Signed-off-by: Daniel Mack Reported-by: Sven Neumann Cc: Pierre Ossman Cc: Eric Miao Cc: linux-mmc@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: stable@kernel.org --- drivers/mmc/host/pxamci.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/mmc/host/pxamci.c b/drivers/mmc/host/pxamci.c index c35df2b..fb0978c 100644 --- a/drivers/mmc/host/pxamci.c +++ b/drivers/mmc/host/pxamci.c @@ -760,6 +760,8 @@ static int pxamci_remove(struct platform_device *pdev) if (mmc) { struct pxamci_host *host = mmc_priv(mmc); + mmc_remove_host(mmc); + if (host->pdata) { gpio_cd = host->pdata->gpio_card_detect; gpio_ro = host->pdata->gpio_card_ro; @@ -779,8 +781,6 @@ static int pxamci_remove(struct platform_device *pdev) if (host->pdata && host->pdata->exit) host->pdata->exit(&pdev->dev, mmc); - mmc_remove_host(mmc); - pxamci_stop_clock(host); writel(TXFIFO_WR_REQ|RXFIFO_RD_REQ|CLK_IS_OFF|STOP_CMD| END_CMD_RES|PRG_DONE|DATA_TRAN_DONE, -- 1.6.5.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/