From: "Emilio G. Cota" <cota@braap.org>
To: Greg KH <greg@kroah.com>
Cc: Martyn Welch <martyn.welch@ge.com>,
LKML <linux-kernel@vger.kernel.org>,
Juan David Gonzalez Cobas <david.cobas@gmail.com>
Subject: [PATCH 02/30] staging/vme_user: return the appropriate error code when module_init fails
Date: Fri, 22 Oct 2010 02:36:24 -0400 [thread overview]
Message-ID: <1287729412-24356-3-git-send-email-cota@braap.org> (raw)
In-Reply-To: <1287729412-24356-1-git-send-email-cota@braap.org>
From: Emilio G. Cota <cota@braap.org>
When init_module fails, 0 is returned anyway; the module is then installed
and oopses when we try to remove it:
[ 3236.368009] WARNING: at drivers/base/driver.c:262 driver_unregister+0x36/0x6f()
[ 3236.368012] Hardware name:
[ 3236.368014] Unexpected driver unregister!
[ 3236.368016] Modules linked in: vme_user(-) vme_tsi148 vme e1000e iTCO_wdt iTCO_vendor_support [last unloaded: vme]
[ 3236.368027] Pid: 16162, comm: rmmod Not tainted 2.6.35 #2
[ 3236.368029] Call Trace:
[ 3236.368037] [<ffffffff81036ea3>] warn_slowpath_common+0x80/0x98
[ 3236.368044] [<ffffffff81060a65>] ? __try_stop_module+0x0/0x58
[ 3236.368049] [<ffffffff81036f4f>] warn_slowpath_fmt+0x41/0x43
[ 3236.368054] [<ffffffff81060a65>] ? __try_stop_module+0x0/0x58
[ 3236.368059] [<ffffffff811e8f78>] driver_unregister+0x36/0x6f
[ 3236.368066] [<ffffffffa004aa44>] vme_unregister_driver+0xd/0xf [vme]
[ 3236.368072] [<ffffffffa00616c8>] vme_user_exit+0x10/0x1e [vme_user]
[ 3236.368076] [<ffffffff810612c1>] sys_delete_module+0x1ba/0x226
[ 3236.368082] [<ffffffff812d6e14>] ? do_page_fault+0x25d/0x28a
[ 3236.368088] [<ffffffff8100202b>] system_call_fastpath+0x16/0x1b
[ 3236.368092] ---[ end trace cab6d88ebc44c1de ]---
The appended fixes it by returning the appropriate error code in module_init
whenever something goes wrong, thus cancelling the insertion of the module.
Signed-off-by: Emilio G. Cota <cota@braap.org>
---
drivers/staging/vme/devices/vme_user.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/drivers/staging/vme/devices/vme_user.c b/drivers/staging/vme/devices/vme_user.c
index cbe2e11..a6f6116 100644
--- a/drivers/staging/vme/devices/vme_user.c
+++ b/drivers/staging/vme/devices/vme_user.c
@@ -611,6 +611,7 @@ static int __init vme_user_init(void)
if (bus_num == 0) {
printk(KERN_ERR "%s: No cards, skipping registration\n",
driver_name);
+ retval = -ENODEV;
goto err_nocard;
}
@@ -629,6 +630,7 @@ static int __init vme_user_init(void)
if (ids == NULL) {
printk(KERN_ERR "%s: Unable to allocate ID table\n",
driver_name);
+ retval = -ENOMEM;
goto err_id;
}
--
1.7.1
next prev parent reply other threads:[~2010-10-22 7:31 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-22 6:36 [-next] staging/vme: various fixes + new driver model for VME Emilio G. Cota
2010-10-22 6:36 ` [PATCH 01/30] staging/vme: style: convert '&(foo)' to '&foo' Emilio G. Cota
2010-10-22 6:36 ` Emilio G. Cota [this message]
2010-10-22 6:36 ` [PATCH 03/30] staging/vme_user: remove unreachable line Emilio G. Cota
2010-10-22 6:36 ` [PATCH 04/30] staging/vme: allow non-dynamic allocation of bus numbers Emilio G. Cota
2010-10-22 6:36 ` [PATCH 05/30] staging/vme: fix bogus clearing of the bus number in vme_free_bus_num Emilio G. Cota
2010-10-22 6:36 ` [PATCH 06/30] staging/vme/tsi148: use list_for_each_safe when deleting resources in .remove Emilio G. Cota
2010-10-22 6:36 ` [PATCH 07/30] staging/vme/tsi148: remove double freeing of the IRQ " Emilio G. Cota
2010-10-22 6:36 ` [PATCH 08/30] staging/vme/tsi148: fix warning in free_irq Emilio G. Cota
2010-10-22 6:36 ` [PATCH 09/30] staging/vme: fill in struct device's .release, even if it's a NOOP Emilio G. Cota
2010-10-22 6:36 ` [PATCH 10/30] staging/vme/tsi148: remove unreachable line Emilio G. Cota
2010-10-22 6:36 ` [PATCH 11/30] staging/vme/tsi148: declare static functions as such Emilio G. Cota
2010-10-22 6:36 ` [PATCH 12/30] staging/vme/ca91cx42: " Emilio G. Cota
2010-10-22 6:36 ` [PATCH 13/30] staging/vme_user: declare private variables as static Emilio G. Cota
2010-10-22 6:36 ` [PATCH 14/30] staging/vme_user: use an unsigned int for counting the number of kparams Emilio G. Cota
2010-10-22 6:36 ` [PATCH 15/30] staging/vme_user: remove __iomem marking from kern_buf and derivates Emilio G. Cota
2010-10-22 6:36 ` [PATCH 16/30] staging/vme_user: mark user-space buffers with __user Emilio G. Cota
2010-10-22 6:36 ` [PATCH 17/30] staging/vme: mark struct vme_master_resource's base address pointer as __iomem Emilio G. Cota
2010-10-22 6:36 ` [PATCH 18/30] staging/vme/tsi148: mark the registers' " Emilio G. Cota
2010-10-22 6:36 ` [PATCH 19/30] staging/vme/ca91cx42: " Emilio G. Cota
2010-10-22 6:36 ` [PATCH 20/30] staging/vme: trivial: rename vme_bus_num_mtx to vme_buses_lock Emilio G. Cota
2010-10-22 6:36 ` [PATCH 21/30] staging/vme: keep a list of registered buses (bridges) Emilio G. Cota
2010-10-22 6:36 ` [PATCH 22/30] staging/vme/vme_user: use __dev{init,exit} for .probe and .remove Emilio G. Cota
2010-10-22 6:36 ` [PATCH 23/30] staging/vme_user: fix usage of the slave resources after they've been freed Emilio G. Cota
2010-10-22 6:36 ` [PATCH 24/30] staging/vme_user: remove unnecessary call to vme_slave_set Emilio G. Cota
2010-10-22 6:36 ` [PATCH 25/30] staging/vme_user: add missing calls to vme_master_free calls in .remove Emilio G. Cota
2010-10-22 6:36 ` [PATCH 26/30] staging/vme: move all contents of vme_bridge.h to vme.h Emilio G. Cota
2010-10-22 6:36 ` [PATCH 27/30] staging/vme: rework the bus model Emilio G. Cota
2010-10-22 23:27 ` Emilio G. Cota
2010-10-25 11:24 ` Martyn Welch
2010-10-26 1:02 ` Emilio G. Cota
2010-10-27 9:16 ` Martyn Welch
2010-10-27 15:40 ` Emilio G. Cota
2010-10-22 6:36 ` [PATCH 28/30] staging/vme: convert vme_* users to vme_*_ng Emilio G. Cota
2010-10-22 6:36 ` [PATCH 29/30] staging/vme: remove unused vme_* functions and related code Emilio G. Cota
2010-10-22 6:36 ` [PATCH 30/30] staging/vme: remove _ng suffixes Emilio G. Cota
2010-10-22 9:26 ` [-next] staging/vme: various fixes + new driver model for VME Martyn Welch
2010-10-22 23:03 ` Emilio G. Cota
2010-10-22 10:08 ` Martyn Welch
2010-10-22 23:04 ` Emilio G. Cota
2010-10-22 13:56 ` Greg KH
2010-10-22 22:56 ` Emilio G. Cota
2010-10-26 1:10 [re-send][-next] " Emilio G. Cota
2010-10-26 1:10 ` [PATCH 02/30] staging/vme_user: return the appropriate error code when module_init fails Emilio G. Cota
2010-10-27 9:25 ` Martyn Welch
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