[bug report] x86/xen/msr: Remove calling native_{read,write}_msr{,_safe}() in pmu_msr_{read,write}()

[Dan Carpenter <dan.carpenter@xxxxxxxxxx>]

Hello Xin Li (Intel),

Commit 0cb6f4128a7d ("x86/xen/msr: Remove calling
native_{read,write}_msr{,_safe}() in pmu_msr_{read,write}()") from
Apr 27, 2025 (linux-next), leads to the following Smatch static
checker warning:

        arch/x86/xen/enlighten_pv.c:1168 xen_read_msr_safe()
        error: uninitialized symbol 'err'.

arch/x86/xen/enlighten_pv.c
    1163 static int xen_read_msr_safe(u32 msr, u64 *val)
    1164 {
    1165         int err;
    1166 
    1167         *val = xen_do_read_msr(msr, &err);
                                              ^^^
The first return in xen_do_read_msr() doesn't set *err.

--> 1168         return err;
    1169 }

regards,
dan carpenter