diff options
| author | Steve French <sfrench@us.ibm.com> | 2007-02-07 00:30:38 +0000 |
|---|---|---|
| committer | Steve French <sfrench@us.ibm.com> | 2007-02-07 00:30:38 +0000 |
| commit | 1d9564ea0ac72ef7c4068d66fe42ad23af4ff53f (patch) | |
| tree | fa63b4c1bbd775252f71d05fef4de6a904eb4448 /arch/s390/kernel/cpcmd.c | |
| parent | 87f440e70e07dace7db130f2f9fcea3f132aad8f (diff) | |
| parent | dda2ac15d23b38e4335e858848aa8c9a6710304f (diff) | |
Merge branch 'master' of /pub/scm/linux/kernel/git/torvalds/linux-2.6
Diffstat (limited to 'arch/s390/kernel/cpcmd.c')
| -rw-r--r-- | arch/s390/kernel/cpcmd.c | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/arch/s390/kernel/cpcmd.c b/arch/s390/kernel/cpcmd.c index a5972f1541f..6c89f30c8e3 100644 --- a/arch/s390/kernel/cpcmd.c +++ b/arch/s390/kernel/cpcmd.c @@ -16,6 +16,7 @@ #include <asm/ebcdic.h> #include <asm/cpcmd.h> #include <asm/system.h> +#include <asm/io.h> static DEFINE_SPINLOCK(cpcmd_lock); static char cpcmd_buf[241]; @@ -88,13 +89,8 @@ int cpcmd(const char *cmd, char *response, int rlen, int *response_code) int len; unsigned long flags; - if ((rlen == 0) || (response == NULL) - || !((unsigned long)response >> 31)) { - spin_lock_irqsave(&cpcmd_lock, flags); - len = __cpcmd(cmd, response, rlen, response_code); - spin_unlock_irqrestore(&cpcmd_lock, flags); - } - else { + if ((virt_to_phys(response) != (unsigned long) response) || + (((unsigned long)response + rlen) >> 31)) { lowbuf = kmalloc(rlen, GFP_KERNEL | GFP_DMA); if (!lowbuf) { printk(KERN_WARNING @@ -106,6 +102,10 @@ int cpcmd(const char *cmd, char *response, int rlen, int *response_code) spin_unlock_irqrestore(&cpcmd_lock, flags); memcpy(response, lowbuf, rlen); kfree(lowbuf); + } else { + spin_lock_irqsave(&cpcmd_lock, flags); + len = __cpcmd(cmd, response, rlen, response_code); + spin_unlock_irqrestore(&cpcmd_lock, flags); } return len; } |