drivers/block/cpqarray.c: better error handling and kmalloc + memset conversion to...

This patch removes some redundant casts, does the kmalloc + memset to
k[cz]alloc conversion and it changes the error path to use goto (to avoid code
duplication).

 drivers/block/cpqarray.c | 49567 -> 48623 (-944 bytes)
 drivers/block/cpqarray.o | 178820 -> 178288 (-532 bytes)

Signed-off-by: Mariusz Kozlowski <m.kozlowski@tuxland.pl>
Acked-by: Mike Miller <mike.miller@hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

diff --git a/drivers/block/cpqarray.c b/drivers/block/cpqarray.c
index be4e3477d83b87f785ba22b43121635acd906b0f..eb9799acf65b8a202606b9e8686a66360a4e9840 100644 (file)
--- a/drivers/block/cpqarray.c
+++ b/drivers/block/cpqarray.c
@@ -420,18 +420,17 @@ static int __init cpqarray_register_ctlr( int i, struct pci_dev *pdev)
                        goto Enomem2;
        }
 
-       hba[i]->cmd_pool = (cmdlist_t *)pci_alloc_consistent(
+       hba[i]->cmd_pool = pci_alloc_consistent(
                hba[i]->pci_dev, NR_CMDS * sizeof(cmdlist_t),
                &(hba[i]->cmd_pool_dhandle));
-       hba[i]->cmd_pool_bits = kmalloc(
-               ((NR_CMDS+BITS_PER_LONG-1)/BITS_PER_LONG)*sizeof(unsigned long),
+       hba[i]->cmd_pool_bits = kcalloc(
+               (NR_CMDS+BITS_PER_LONG-1)/BITS_PER_LONG, sizeof(unsigned long),
                GFP_KERNEL);
 
        if (!hba[i]->cmd_pool_bits || !hba[i]->cmd_pool)
                        goto Enomem1;
 
        memset(hba[i]->cmd_pool, 0, NR_CMDS * sizeof(cmdlist_t));
-       memset(hba[i]->cmd_pool_bits, 0, ((NR_CMDS+BITS_PER_LONG-1)/BITS_PER_LONG)*sizeof(unsigned long));
        printk(KERN_INFO "cpqarray: Finding drives on %s",
                hba[i]->devname);
 
@@ -1660,45 +1659,30 @@ static void getgeometry(int ctlr)
 
        info_p->log_drv_map = 0;        
        
-       id_ldrive = kmalloc(sizeof(id_log_drv_t), GFP_KERNEL);
-       if(id_ldrive == NULL)
-       {
+       id_ldrive = kzalloc(sizeof(id_log_drv_t), GFP_KERNEL);
+       if (!id_ldrive) {
                printk( KERN_ERR "cpqarray:  out of memory.\n");
-               return;
+               goto err_0;
        }
 
-       id_ctlr_buf = kmalloc(sizeof(id_ctlr_t), GFP_KERNEL);
-       if(id_ctlr_buf == NULL)
-       {
-               kfree(id_ldrive);
+       id_ctlr_buf = kzalloc(sizeof(id_ctlr_t), GFP_KERNEL);
+       if (!id_ctlr_buf) {
                printk( KERN_ERR "cpqarray:  out of memory.\n");
-               return;
+               goto err_1;
        }
 
-       id_lstatus_buf = kmalloc(sizeof(sense_log_drv_stat_t), GFP_KERNEL);
-       if(id_lstatus_buf == NULL)
-       {
-               kfree(id_ctlr_buf);
-               kfree(id_ldrive);
+       id_lstatus_buf = kzalloc(sizeof(sense_log_drv_stat_t), GFP_KERNEL);
+       if (!id_lstatus_buf) {
                printk( KERN_ERR "cpqarray:  out of memory.\n");
-               return;
+               goto err_2;
        }
 
-       sense_config_buf = kmalloc(sizeof(config_t), GFP_KERNEL);
-       if(sense_config_buf == NULL)
-       {
-               kfree(id_lstatus_buf);
-               kfree(id_ctlr_buf);
-               kfree(id_ldrive);
+       sense_config_buf = kzalloc(sizeof(config_t), GFP_KERNEL);
+       if (!sense_config_buf) {
                printk( KERN_ERR "cpqarray:  out of memory.\n");
-               return;
+               goto err_3;
        }
 
-       memset(id_ldrive, 0, sizeof(id_log_drv_t));
-       memset(id_ctlr_buf, 0, sizeof(id_ctlr_t));
-       memset(id_lstatus_buf, 0, sizeof(sense_log_drv_stat_t));
-       memset(sense_config_buf, 0, sizeof(config_t));
-
        info_p->phys_drives = 0;
        info_p->log_drv_map = 0;
        info_p->drv_assign_map = 0;
@@ -1712,13 +1696,8 @@ static void getgeometry(int ctlr)
                 * so the idastubopen will fail on all logical drives
                 * on the controller.
                 */
-                /* Free all the buffers and return */ 
                printk(KERN_ERR "cpqarray: error sending ID controller\n");
-               kfree(sense_config_buf);
-                kfree(id_lstatus_buf);
-                kfree(id_ctlr_buf);
-                kfree(id_ldrive);
-                return;
+                goto err_4;
         }
 
        info_p->log_drives = id_ctlr_buf->nr_drvs;
@@ -1764,12 +1743,7 @@ static void getgeometry(int ctlr)
                                " failed to report status of logical drive %d\n"
                         "Access to this controller has been disabled\n",
                                ctlr, log_unit);
-                       /* Free all the buffers and return */
-                       kfree(sense_config_buf);
-                       kfree(id_lstatus_buf);
-                       kfree(id_ctlr_buf);
-                       kfree(id_ldrive);
-                       return;
+                       goto err_4;
                }
                /*
                   Make sure the logical drive is configured
@@ -1798,14 +1772,8 @@ static void getgeometry(int ctlr)
                                 sizeof(config_t), 0, 0, log_unit);
                                if (ret_code == IO_ERROR) {
                                        info_p->log_drv_map = 0;
-                                       /* Free all the buffers and return */
                                        printk(KERN_ERR "cpqarray: error sending sense config\n");
-                                       kfree(sense_config_buf);
-                                       kfree(id_lstatus_buf);
-                                       kfree(id_ctlr_buf);
-                                       kfree(id_ldrive);
-                                       return;
-
+                                       goto err_4;
                                }
 
                                info_p->phys_drives =
@@ -1820,12 +1788,18 @@ static void getgeometry(int ctlr)
                        log_index = log_index + 1;
                }               /* end of if logical drive configured */
        }                       /* end of for log_unit */
+
+       /* Free all the buffers and return */
+err_4:
        kfree(sense_config_buf);
-       kfree(id_ldrive);
+err_3:
        kfree(id_lstatus_buf);
+err_2:
        kfree(id_ctlr_buf);
+err_1:
+       kfree(id_ldrive);
+err_0:
        return;
-
 }
 
 static void __exit cpqarray_exit(void)