xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ipmi: Don't allow device module unload when in use

Browse Source 
If something has the IPMI driver open, don't allow the device
module to be unloaded.  Before it would unload and the user would
get errors on use.

This change is made on user request, and it makes it consistent
with the I2C driver, which has the same behavior.

It does change things a little bit with respect to kernel users.
If the ACPI or IPMI watchdog (or any other kernel user) has
created a user, then the device module cannot be unloaded.  Before
it could be unloaded,

This does not affect hot-plug.  If the device goes away (it's on
something removable that is removed or is hot-removed via sysfs)
then it still behaves as it did before.

Reported-by: tony camuso <tcamuso@redhat.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Tested-by: tony camuso <tcamuso@redhat.com>
This commit is contained in:
Corey Minyard
2019-10-14 10:35:56 -05:00
parent 3b7c59a195
commit cbb79863fc
2 changed files with 24 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
include/linux/ipmi_smi.h
View File

@@ -224,10 +224,14 @@ static inline int ipmi_demangle_device_id(uint8_t netfn, uint8_t cmd,
* is called, and the lower layer must get the interface from that
* call.
*/
int ipmi_register_smi(const struct ipmi_smi_handlers *handlers,
void *send_info,
struct device *dev,
unsigned char slave_addr);
int ipmi_add_smi(struct module *owner,
const struct ipmi_smi_handlers *handlers,
void *send_info,
struct device *dev,
unsigned char slave_addr);
#define ipmi_register_smi(handlers, send_info, dev, slave_addr) \
ipmi_add_smi(THIS_MODULE, handlers, send_info, dev, slave_addr)
/*
* Remove a low-level interface from the IPMI driver. This will