From d19cb862948a2de32068b6775a4e0a14fa4d8ec9 Mon Sep 17 00:00:00 2001 From: Somya Anand Date: Sat, 14 Mar 2015 01:03:07 +0530 Subject: [PATCH] Staging: ft1000: Iterate list using list_for_each_entry Code using doubly linked list is iterated generally using list_empty and list_entry functions, but it can be better written using list_for_each_entry macro. This patch replaces the while loop containing list_empty and list_entry with list_for_each_entry and list_for_each_entry_safe. list_for_each_entry is a macro which is used to iterate over a list of given type. So while loop used to iterate over a list can be replaced with list_for_each_entry macro. However, if list_del is used in the loop, then list_for_each_entry_safe is a better choice. This transformation is done by using the following coccinelle script. @ rule1 @ expression E1; identifier I1, I2; type T; iterator name list_for_each_entry; @@ - while (list_empty(&E1) == 0) + list_for_each_entry (I1, &E1, I2) { ...when != T *I1; - I1 = list_entry(E1.next, T, I2); ...when != list_del(...); when != list_del_init(...); } @ rule2 @ expression E1; identifier I1, I2; type T; iterator name list_for_each_entry_safe; @@ T *I1; + T *tmp; ... - while (list_empty(&E1) == 0) + list_for_each_entry_safe (I1, tmp, &E1, I2) { ...when != T *I1; - I1 = list_entry(E1.next, T, I2); ... } Signed-off-by: Somya Anand Signed-off-by: Greg Kroah-Hartman --- drivers/staging/ft1000/ft1000-pcmcia/ft1000_hw.c | 8 ++++---- drivers/staging/ft1000/ft1000-usb/ft1000_debug.c | 4 ++-- drivers/staging/ft1000/ft1000-usb/ft1000_hw.c | 5 ++--- 3 files changed, 8 insertions(+), 9 deletions(-) diff --git a/drivers/staging/ft1000/ft1000-pcmcia/ft1000_hw.c b/drivers/staging/ft1000/ft1000-pcmcia/ft1000_hw.c index e4559caed02b..e5890dbcb98a 100644 --- a/drivers/staging/ft1000/ft1000-pcmcia/ft1000_hw.c +++ b/drivers/staging/ft1000/ft1000-pcmcia/ft1000_hw.c @@ -364,6 +364,7 @@ static int ft1000_reset_card(struct net_device *dev) int i; unsigned long flags; struct prov_record *ptr; + struct prov_record *tmp; info->CardReady = 0; info->ProgConStat = 0; @@ -373,9 +374,8 @@ static int ft1000_reset_card(struct net_device *dev) /* del_timer(&poll_timer); */ /* Make sure we free any memory reserve for provisioning */ - while (list_empty(&info->prov_list) == 0) { + list_for_each_entry_safe(ptr, tmp, &info->prov_list, list) { pr_debug("deleting provisioning record\n"); - ptr = list_entry(info->prov_list.next, struct prov_record, list); list_del(&ptr->list); kfree(ptr->pprov_data); kfree(ptr); @@ -1973,6 +1973,7 @@ void stop_ft1000_card(struct net_device *dev) { struct ft1000_info *info = netdev_priv(dev); struct prov_record *ptr; + struct prov_record *tmp; /* int cnt; */ info->CardReady = 0; @@ -1981,8 +1982,7 @@ void stop_ft1000_card(struct net_device *dev) ft1000_disable_interrupts(dev); /* Make sure we free any memory reserve for provisioning */ - while (list_empty(&info->prov_list) == 0) { - ptr = list_entry(info->prov_list.next, struct prov_record, list); + list_for_each_entry_safe(ptr, tmp, &info->prov_list, list) { list_del(&ptr->list); kfree(ptr->pprov_data); kfree(ptr); diff --git a/drivers/staging/ft1000/ft1000-usb/ft1000_debug.c b/drivers/staging/ft1000/ft1000-usb/ft1000_debug.c index 71385231d72c..b427825ce001 100644 --- a/drivers/staging/ft1000/ft1000-usb/ft1000_debug.c +++ b/drivers/staging/ft1000/ft1000-usb/ft1000_debug.c @@ -742,6 +742,7 @@ static int ft1000_release(struct inode *inode, struct file *file) struct ft1000_usb *ft1000dev; int i; struct dpram_blk *pdpram_blk; + struct dpram_blk *tmp; dev = file->private_data; info = netdev_priv(dev); @@ -763,9 +764,8 @@ static int ft1000_release(struct inode *inode, struct file *file) if (i == MAX_NUM_APP) return 0; - while (list_empty(&ft1000dev->app_info[i].app_sqlist) == 0) { + list_for_each_entry_safe(pdpram_blk, tmp, &ft1000dev->app_info[i].app_sqlist, list) { pr_debug("Remove and free memory queue up on slow queue\n"); - pdpram_blk = list_entry(ft1000dev->app_info[i].app_sqlist.next, struct dpram_blk, list); list_del(&pdpram_blk->list); ft1000_free_buffer(pdpram_blk, &freercvpool); } diff --git a/drivers/staging/ft1000/ft1000-usb/ft1000_hw.c b/drivers/staging/ft1000/ft1000-usb/ft1000_hw.c index 26207781abcb..e6fb066e0dd2 100644 --- a/drivers/staging/ft1000/ft1000-usb/ft1000_hw.c +++ b/drivers/staging/ft1000/ft1000-usb/ft1000_hw.c @@ -451,16 +451,15 @@ static int ft1000_reset_card(struct net_device *dev) struct ft1000_usb *ft1000dev = info->priv; u16 tempword; struct prov_record *ptr; + struct prov_record *tmp; ft1000dev->fCondResetPend = true; info->CardReady = 0; ft1000dev->fProvComplete = false; /* Make sure we free any memory reserve for provisioning */ - while (list_empty(&info->prov_list) == 0) { + list_for_each_entry_safe(ptr, tmp, &info->prov_list, list) { pr_debug("deleting provisioning record\n"); - ptr = - list_entry(info->prov_list.next, struct prov_record, list); list_del(&ptr->list); kfree(ptr->pprov_data); kfree(ptr); -- 2.39.5