@@ -1585,7 +1585,8 @@ static char * const media_name[] = {
} })
#define GET_SEPROM \
({ if (!error && !pci_error) { \
- pci_error = pci_read_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,&tonga); \
+ pci_read_config_byte(eni_dev->pci_dev, PCI_TONGA_CTRL, &tonga); \
+ pci_error = (tonga == (u8)~0) ? -1 : 0; \
udelay(10); /* 10 usecs */ \
} })
@@ -995,7 +995,8 @@ static int he_start(struct atm_dev *dev)
*/
/* 4.3 pci bus controller-specific initialization */
- if (pci_read_config_dword(pci_dev, GEN_CNTL_0, &gen_cntl_0) != 0) {
+ pci_read_config_dword(pci_dev, GEN_CNTL_0, &gen_cntl_0);
+ if (gen_cntl_0 == (u32)~0) {
hprintk("can't read GEN_CNTL_0\n");
return -EINVAL;
}
@@ -1005,7 +1006,8 @@ static int he_start(struct atm_dev *dev)
return -EINVAL;
}
- if (pci_read_config_word(pci_dev, PCI_COMMAND, &command) != 0) {
+ pci_read_config_word(pci_dev, PCI_COMMAND, &command);
+ if (command == (u16)~0) {
hprintk("can't read PCI_COMMAND.\n");
return -EINVAL;
}
@@ -1016,7 +1018,8 @@ static int he_start(struct atm_dev *dev)
return -EINVAL;
}
- if (pci_read_config_byte(pci_dev, PCI_CACHE_LINE_SIZE, &cache_size)) {
+ pci_read_config_byte(pci_dev, PCI_CACHE_LINE_SIZE, &cache_size);
+ if (cache_size == (u8)~0) {
hprintk("can't read cache line size?\n");
return -EINVAL;
}
@@ -1027,7 +1030,8 @@ static int he_start(struct atm_dev *dev)
hprintk("can't set cache line size to %d\n", cache_size);
}
- if (pci_read_config_byte(pci_dev, PCI_LATENCY_TIMER, &timer)) {
+ pci_read_config_byte(pci_dev, PCI_LATENCY_TIMER, &timer);
+ if (timer == (u8)~0) {
hprintk("can't read latency timer?\n");
return -EINVAL;
}
@@ -3271,7 +3271,8 @@ static int init_card(struct atm_dev *dev)
/* Set PCI Retry-Timeout and TRDY timeout */
IPRINTK("%s: Checking PCI retries.\n", card->name);
- if (pci_read_config_byte(pcidev, 0x40, &pci_byte) != 0) {
+ pci_read_config_byte(pcidev, 0x40, &pci_byte);
+ if (pci_byte == (u_char)~0) {
printk("%s: can't read PCI retry timeout.\n", card->name);
deinit_card(card);
return -1;
@@ -3287,7 +3288,8 @@ static int init_card(struct atm_dev *dev)
}
}
IPRINTK("%s: Checking PCI TRDY.\n", card->name);
- if (pci_read_config_byte(pcidev, 0x41, &pci_byte) != 0) {
+ pci_read_config_byte(pcidev, 0x41, &pci_byte);
+ if (pci_byte == (u_char)~0) {
printk("%s: can't read PCI TRDY timeout.\n", card->name);
deinit_card(card);
return -1;
@@ -3535,7 +3537,8 @@ static int idt77252_preset(struct idt77252_dev *card)
XPRINTK("%s: Enable PCI master and memory access for SAR.\n",
card->name);
- if (pci_read_config_word(card->pcidev, PCI_COMMAND, &pci_command)) {
+ pci_read_config_word(card->pcidev, PCI_COMMAND, &pci_command);
+ if (pci_command == (u16)~0) {
printk("%s: can't read PCI_COMMAND.\n", card->name);
deinit_card(card);
return -1;
@@ -2287,25 +2287,29 @@ static int get_esi(struct atm_dev *dev)
return 0;
}
-static int reset_sar(struct atm_dev *dev)
-{
- IADEV *iadev;
- int i, error = 1;
- unsigned int pci[64];
-
- iadev = INPH_IA_DEV(dev);
- for(i=0; i<64; i++)
- if ((error = pci_read_config_dword(iadev->pci,
- i*4, &pci[i])) != PCIBIOS_SUCCESSFUL)
- return error;
- writel(0, iadev->reg+IPHASE5575_EXT_RESET);
- for(i=0; i<64; i++)
- if ((error = pci_write_config_dword(iadev->pci,
- i*4, pci[i])) != PCIBIOS_SUCCESSFUL)
- return error;
- udelay(5);
- return 0;
-}
+static int reset_sar(struct atm_dev *dev)
+{
+ IADEV *iadev;
+ int i, error = 1;
+ unsigned int pci[64];
+
+ iadev = INPH_IA_DEV(dev);
+ for (i = 0; i < 64; i++) {
+ pci_read_config_dword(iadev->pci, i*4, &pci[i]);
+ if (pci[i] == (u32)~0)
+ return error;
+ }
+
+ writel(0, iadev->reg+IPHASE5575_EXT_RESET);
+ for (i = 0; i < 64; i++) {
+ error = pci_write_config_dword(iadev->pci, i*4, pci[i]);
+ if (error != PCIBIOS_SUCCESSFUL)
+ return error;
+ }
+
+ udelay(5);
+ return 0;
+}
static int ia_init(struct atm_dev *dev)
@@ -2328,8 +2332,8 @@ static int ia_init(struct atm_dev *dev)
real_base = pci_resource_start (iadev->pci, 0);
iadev->irq = iadev->pci->irq;
- error = pci_read_config_word(iadev->pci, PCI_COMMAND, &command);
- if (error) {
+ pci_read_config_word(iadev->pci, PCI_COMMAND, &command);
+ if (command == (u16)~0) {
printk(KERN_ERR DEV_LABEL "(itf %d): init error 0x%x\n",
dev->number,error);
return -EINVAL;
@@ -1097,8 +1097,8 @@ static void pcistatus_check(struct lanai_dev *lanai, int clearonly)
{
u16 s;
int result;
- result = pci_read_config_word(lanai->pci, PCI_STATUS, &s);
- if (result != PCIBIOS_SUCCESSFUL) {
+ pci_read_config_word(lanai->pci, PCI_STATUS, &s);
+ if (s == (u16)~0) {
printk(KERN_ERR DEV_LABEL "(itf %d): can't read PCI_STATUS: "
"%d\n", lanai->number, result);
return;
@@ -399,7 +399,8 @@ static int ns_init_card(int i, struct pci_dev *pcidev)
pci_set_master(pcidev);
- if (pci_read_config_byte(pcidev, PCI_LATENCY_TIMER, &pci_latency) != 0) {
+ pci_read_config_byte(pcidev, PCI_LATENCY_TIMER, &pci_latency);
+ if (pci_latency == (u8)~0) {
printk("nicstar%d: can't read PCI latency timer.\n", i);
error = 6;
ns_init_card_error(card, error);
@@ -1112,11 +1112,11 @@ static void eprom_set(struct zatm_dev *zatm_dev, unsigned long value,
static unsigned long eprom_get(struct zatm_dev *zatm_dev, unsigned short cmd)
{
unsigned int value;
- int error;
- if ((error = pci_read_config_dword(zatm_dev->pci_dev,cmd,&value)))
+ pci_read_config_dword(zatm_dev->pci_dev, cmd, &value);
+ if (value == (u64)~0)
printk(KERN_ERR DEV_LABEL ": PCI read failed (0x%02x)\n",
- error);
+ value);
return value;
}
@@ -1197,7 +1197,8 @@ static int zatm_init(struct atm_dev *dev)
pci_dev = zatm_dev->pci_dev;
zatm_dev->base = pci_resource_start(pci_dev, 0);
zatm_dev->irq = pci_dev->irq;
- if ((error = pci_read_config_word(pci_dev,PCI_COMMAND,&command))) {
+ pci_read_config_word(pci_dev, PCI_COMMAND, &command);
+ if (command == (u16)~0) {
printk(KERN_ERR DEV_LABEL "(itf %d): init error 0x%02x\n",
dev->number,error);
return -EINVAL;
The return value of pci_read_config_*() may not indicate a device error. However, the value read by these functions is more likely to indicate this kind of error. This presents two overlapping ways of reporting errors and complicates error checking. It is possible to move to one single way of checking for error if the dependency on the return value of these functions is removed, then it can later be made to return void. Remove all uses of the return value of pci_read_config_*(). Check the actual value read for ~0. In this case, ~0 is an invalid value thus it indicates some kind of error. Suggested-by: Bjorn Helgaas <bjorn@helgaas.com> Signed-off-by: Saheed O. Bolarinwa <refactormyself@gmail.com> --- drivers/atm/eni.c | 3 ++- drivers/atm/he.c | 12 +++++++---- drivers/atm/idt77252.c | 9 ++++++--- drivers/atm/iphase.c | 46 +++++++++++++++++++++++------------------- drivers/atm/lanai.c | 4 ++-- drivers/atm/nicstar.c | 3 ++- drivers/atm/zatm.c | 9 +++++---- 7 files changed, 50 insertions(+), 36 deletions(-)