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| author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-10-20 00:10:27 -0300 |
|---|---|---|
| committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-10-20 00:10:27 -0300 |
| commit | d0b2f91bede3bd5e3d24dd6803e56eee959c1797 (patch) | |
| tree | 7fee4ab0509879c373c4f2cbd5b8a5be5b4041ee /drivers/s390/char/sclp_ocf.c | |
| parent | e914f8eb445e8f74b00303c19c2ffceaedd16a05 (diff) | |
Linux-libre 4.8.2-gnupck-4.8.2-gnu
Diffstat (limited to 'drivers/s390/char/sclp_ocf.c')
| -rw-r--r-- | drivers/s390/char/sclp_ocf.c | 23 |
1 files changed, 15 insertions, 8 deletions
diff --git a/drivers/s390/char/sclp_ocf.c b/drivers/s390/char/sclp_ocf.c index 2553db0fd..f59b71776 100644 --- a/drivers/s390/char/sclp_ocf.c +++ b/drivers/s390/char/sclp_ocf.c @@ -26,7 +26,7 @@ #define OCF_LENGTH_CPC_NAME 8UL static char hmc_network[OCF_LENGTH_HMC_NETWORK + 1]; -static char cpc_name[OCF_LENGTH_CPC_NAME + 1]; +static char cpc_name[OCF_LENGTH_CPC_NAME]; /* in EBCDIC */ static DEFINE_SPINLOCK(sclp_ocf_lock); static struct work_struct sclp_ocf_change_work; @@ -72,9 +72,8 @@ static void sclp_ocf_handler(struct evbuf_header *evbuf) } if (cpc) { size = min(OCF_LENGTH_CPC_NAME, (size_t) cpc->length); + memset(cpc_name, 0, OCF_LENGTH_CPC_NAME); memcpy(cpc_name, cpc + 1, size); - EBCASC(cpc_name, size); - cpc_name[size] = 0; } spin_unlock(&sclp_ocf_lock); schedule_work(&sclp_ocf_change_work); @@ -85,15 +84,23 @@ static struct sclp_register sclp_ocf_event = { .receiver_fn = sclp_ocf_handler, }; +void sclp_ocf_cpc_name_copy(char *dst) +{ + spin_lock_irq(&sclp_ocf_lock); + memcpy(dst, cpc_name, OCF_LENGTH_CPC_NAME); + spin_unlock_irq(&sclp_ocf_lock); +} +EXPORT_SYMBOL(sclp_ocf_cpc_name_copy); + static ssize_t cpc_name_show(struct kobject *kobj, struct kobj_attribute *attr, char *page) { - int rc; + char name[OCF_LENGTH_CPC_NAME + 1]; - spin_lock_irq(&sclp_ocf_lock); - rc = snprintf(page, PAGE_SIZE, "%s\n", cpc_name); - spin_unlock_irq(&sclp_ocf_lock); - return rc; + sclp_ocf_cpc_name_copy(name); + name[OCF_LENGTH_CPC_NAME] = 0; + EBCASC(name, OCF_LENGTH_CPC_NAME); + return snprintf(page, PAGE_SIZE, "%s\n", name); } static struct kobj_attribute cpc_name_attr = |