From: "Eric Bénard" <eric@eukrea.com>
To: linux-mtd@lists.infradead.org
Cc: s.hauer@pengutronix.de, ivo.clarysse@gmail.com,
linux-arm-kernel@lists.arm.linux.org.uk,
u.kleine-koenig@pengutronix.de
Subject: [PATCH 1/2] mxc_nand: fix Unbalanced enable for IRQ
Date: Thu, 10 Jun 2010 16:03:04 +0200 [thread overview]
Message-ID: <1276178584-10074-1-git-send-email-eric@eukrea.com> (raw)
* preset should be done before sending the reset command
* without this, I get the following error on an i.MX35 :
[ 0.900000] ------------[ cut here ]------------
[ 0.900000] WARNING: at kernel/irq/manage.c:290 __enable_irq+0x4c/0x88()
[ 0.900000] Unbalanced enable for IRQ 33
[ 0.900000] Modules linked in:
[ 0.900000] [<c002ffb8>] (unwind_backtrace+0x0/0xf0) from [<c02f7d0c>] (dump_stack+0x18/0x1c)
[ 0.900000] [<c02f7d0c>] (dump_stack+0x18/0x1c) from [<c0049a44>] (warn_slowpath_common+0x54/0x6c)
[ 0.900000] [<c0049a44>] (warn_slowpath_common+0x54/0x6c) from [<c0049b00>] (warn_slowpath_fmt+0x38/0x40)
[ 0.900000] [<c0049b00>] (warn_slowpath_fmt+0x38/0x40) from [<c008f65c>] (__enable_irq+0x4c/0x88)
[ 0.900000] [<c008f65c>] (__enable_irq+0x4c/0x88) from [<c008fca0>] (enable_irq+0x54/0x98)
[ 0.900000] [<c008fca0>] (enable_irq+0x54/0x98) from [<c021e618>] (wait_op_done+0x40/0x134)
[ 0.900000] [<c021e618>] (wait_op_done+0x40/0x134) from [<c021e808>] (send_cmd+0x30/0x38)
[ 0.900000] [<c021e808>] (send_cmd+0x30/0x38) from [<c021eb8c>] (mxc_nand_command+0x26c/0x328)
[ 0.900000] [<c021eb8c>] (mxc_nand_command+0x26c/0x328) from [<c021aa60>] (nand_scan_ident+0x188/0x6c0)
[ 0.900000] [<c021aa60>] (nand_scan_ident+0x188/0x6c0) from [<c001a9cc>] (mxcnd_probe+0x2b8/0x3d0)
[ 0.900000] [<c001a9cc>] (mxcnd_probe+0x2b8/0x3d0) from [<c01f9e88>] (platform_drv_probe+0x20/0x24)
[ 0.900000] [<c01f9e88>] (platform_drv_probe+0x20/0x24) from [<c01f8c38>] (driver_probe_device+0xb0/0x164)
[ 0.900000] [<c01f8c38>] (driver_probe_device+0xb0/0x164) from [<c01f8d54>] (__driver_attach+0x68/0x8c)
[ 0.900000] [<c01f8d54>] (__driver_attach+0x68/0x8c) from [<c01f8348>] (bus_for_each_dev+0x50/0x84)
[ 0.900000] [<c01f8348>] (bus_for_each_dev+0x50/0x84) from [<c01f8a9c>] (driver_attach+0x20/0x28)
[ 0.900000] [<c01f8a9c>] (driver_attach+0x20/0x28) from [<c01f7c00>] (bus_add_driver+0x144/0x2dc)
[ 0.900000] [<c01f7c00>] (bus_add_driver+0x144/0x2dc) from [<c01f906c>] (driver_register+0xb0/0x13c)
[ 0.900000] [<c01f906c>] (driver_register+0xb0/0x13c) from [<c01fa13c>] (platform_driver_register+0x4c/0x60)
[ 0.900000] [<c01fa13c>] (platform_driver_register+0x4c/0x60) from [<c01fa170>] (platform_driver_probe+0x20/0xa0)
[ 0.900000] [<c01fa170>] (platform_driver_probe+0x20/0xa0) from [<c001a708>] (mxc_nd_init+0x18/0x24)
[ 0.900000] [<c001a708>] (mxc_nd_init+0x18/0x24) from [<c002938c>] (do_one_initcall+0x64/0x1bc)
[ 0.900000] [<c002938c>] (do_one_initcall+0x64/0x1bc) from [<c00084c4>] (kernel_init+0xe8/0x1ac)
[ 0.900000] [<c00084c4>] (kernel_init+0xe8/0x1ac) from [<c002aee8>] (kernel_thread_exit+0x0/0x8)
[ 0.900000] ---[ end trace 8bf72ac6ba089a19 ]---
[ 1.140000] NAND device: Manufacturer ID: 0x2c, Chip ID: 0xda (Micron NAND 256MiB 3,3V 8-bit)
Signed-off-by: Eric Bénard <eric@eukrea.com>
---
drivers/mtd/nand/mxc_nand.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c
index 82e9438..8878503 100644
--- a/drivers/mtd/nand/mxc_nand.c
+++ b/drivers/mtd/nand/mxc_nand.c
@@ -604,8 +604,8 @@ static void mxc_nand_command(struct mtd_info *mtd, unsigned command,
/* Command pre-processing step */
switch (command) {
case NAND_CMD_RESET:
- send_cmd(host, command, false);
preset(mtd);
+ send_cmd(host, command, false);
break;
case NAND_CMD_STATUS:
--
1.6.3.3
next reply other threads:[~2010-06-10 14:03 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-10 14:03 Eric Bénard [this message]
2010-07-16 6:53 ` [PATCH 1/2] mxc_nand: fix Unbalanced enable for IRQ Sascha Hauer
2010-07-17 5:50 ` Artem Bityutskiy
2010-07-20 10:20 ` Marc Kleine-Budde
2010-07-20 10:22 ` Artem Bityutskiy
2010-07-20 21:36 ` Marc Kleine-Budde
2010-07-24 9:58 ` Marc Kleine-Budde
2010-08-02 9:32 ` Uwe Kleine-König
2010-08-05 4:55 ` Artem Bityutskiy
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