diff options
Diffstat (limited to 'drivers/scsi/bfa/bfad_debugfs.c')
| -rw-r--r-- | drivers/scsi/bfa/bfad_debugfs.c | 42 |
1 files changed, 37 insertions, 5 deletions
diff --git a/drivers/scsi/bfa/bfad_debugfs.c b/drivers/scsi/bfa/bfad_debugfs.c index 1fedeeb4ac1f..0fbd620474c7 100644 --- a/drivers/scsi/bfa/bfad_debugfs.c +++ b/drivers/scsi/bfa/bfad_debugfs.c @@ -208,7 +208,7 @@ bfad_debugfs_read(struct file *file, char __user *buf, if (!debug || !debug->debug_buffer) return 0; - return memory_read_from_buffer(buf, nbytes, pos, + return simple_read_from_buffer(buf, nbytes, pos, debug->debug_buffer, debug->buffer_len); } @@ -254,7 +254,7 @@ bfad_debugfs_read_regrd(struct file *file, char __user *buf, if (!bfad->regdata) return 0; - rc = memory_read_from_buffer(buf, nbytes, pos, + rc = simple_read_from_buffer(buf, nbytes, pos, bfad->regdata, bfad->reglen); if ((*pos + nbytes) >= bfad->reglen) { @@ -279,15 +279,31 @@ bfad_debugfs_write_regrd(struct file *file, const char __user *buf, u32 *regbuf; void __iomem *rb, *reg_addr; unsigned long flags; + void *kern_buf; - rc = sscanf(buf, "%x:%x", &addr, &len); + kern_buf = kzalloc(nbytes, GFP_KERNEL); + + if (!kern_buf) { + printk(KERN_INFO "bfad[%d]: Failed to allocate buffer\n", + bfad->inst_no); + return -ENOMEM; + } + + if (copy_from_user(kern_buf, (void __user *)buf, nbytes)) { + kfree(kern_buf); + return -ENOMEM; + } + + rc = sscanf(kern_buf, "%x:%x", &addr, &len); if (rc < 2) { printk(KERN_INFO "bfad[%d]: %s failed to read user buf\n", bfad->inst_no, __func__); + kfree(kern_buf); return -EINVAL; } + kfree(kern_buf); kfree(bfad->regdata); bfad->regdata = NULL; bfad->reglen = 0; @@ -339,14 +355,30 @@ bfad_debugfs_write_regwr(struct file *file, const char __user *buf, int addr, val, rc; void __iomem *reg_addr; unsigned long flags; + void *kern_buf; + + kern_buf = kzalloc(nbytes, GFP_KERNEL); + + if (!kern_buf) { + printk(KERN_INFO "bfad[%d]: Failed to allocate buffer\n", + bfad->inst_no); + return -ENOMEM; + } + + if (copy_from_user(kern_buf, (void __user *)buf, nbytes)) { + kfree(kern_buf); + return -ENOMEM; + } - rc = sscanf(buf, "%x:%x", &addr, &val); + rc = sscanf(kern_buf, "%x:%x", &addr, &val); if (rc < 2) { printk(KERN_INFO "bfad[%d]: %s failed to read user buf\n", bfad->inst_no, __func__); + kfree(kern_buf); return -EINVAL; } + kfree(kern_buf); addr &= BFA_REG_ADDRMSK(bfa); /* offset only 17 bit and word align */ @@ -359,7 +391,7 @@ bfad_debugfs_write_regwr(struct file *file, const char __user *buf, return -EINVAL; } - reg_addr = (u32 *) ((u8 *) bfa_ioc_bar0(ioc) + addr); + reg_addr = (bfa_ioc_bar0(ioc)) + addr; spin_lock_irqsave(&bfad->bfad_lock, flags); writel(val, reg_addr); spin_unlock_irqrestore(&bfad->bfad_lock, flags); |