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parport: fix if-statement empty body warnings 

Eliminate warnings by using pr_debug which is the more typical
kernel debugging style and also enable dynamic_debug on these
outputs.

Miscellaneous:

o A few messages were logged at KERN_INFO when enabled, now KERN_DEBUG
o Convert %d/%d to %zd/%zu to avoid compilation warnings

Original-patch-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Link: https://lore.kernel.org/r/20200403134325.11523-1-sudipm.mukherjee@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Joe Perches 2020-04-03 14:43:15 +01:00 committed by Greg Kroah-Hartman
parent af83114515
commit d98ce9fef7
2 changed files with 57 additions and 100 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

90
drivers/parport/ieee1284.c
View File

@ -31,12 +31,6 @@
#undef DEBUG /* Don't want a garbled console */
#endif
#ifdef DEBUG
#define DPRINTK(stuff...) printk (stuff)
#else
#define DPRINTK(stuff...)
#endif
/* Make parport_wait_peripheral wake up.
* It will be useful to call this from an interrupt handler. */
static void parport_ieee1284_wakeup (struct parport *port)
@ -258,12 +252,11 @@ static void parport_ieee1284_terminate (struct parport *port)
PARPORT_STATUS_PAPEROUT,
PARPORT_STATUS_PAPEROUT);
if (r)
DPRINTK (KERN_INFO "%s: Timeout at event 49\n",
pr_debug("%s: Timeout at event 49\n",
port->name);
parport_data_forward (port);
DPRINTK (KERN_DEBUG "%s: ECP direction: forward\n",
port->name);
pr_debug("%s: ECP direction: forward\n", port->name);
port->ieee1284.phase = IEEE1284_PH_FWD_IDLE;
}
@ -281,8 +274,7 @@ static void parport_ieee1284_terminate (struct parport *port)
/* Event 24: nAck goes low */
r = parport_wait_peripheral (port, PARPORT_STATUS_ACK, 0);
if (r)
DPRINTK (KERN_INFO "%s: Timeout at event 24\n",
port->name);
pr_debug("%s: Timeout at event 24\n", port->name);
/* Event 25: Set nAutoFd low */
parport_frob_control (port,
@ -294,8 +286,7 @@ static void parport_ieee1284_terminate (struct parport *port)
PARPORT_STATUS_ACK,
PARPORT_STATUS_ACK);
if (r)
DPRINTK (KERN_INFO "%s: Timeout at event 27\n",
port->name);
pr_debug("%s: Timeout at event 27\n", port->name);
/* Event 29: Set nAutoFd high */
parport_frob_control (port, PARPORT_CONTROL_AUTOFD, 0);
@ -304,8 +295,7 @@ static void parport_ieee1284_terminate (struct parport *port)
port->ieee1284.mode = IEEE1284_MODE_COMPAT;
port->ieee1284.phase = IEEE1284_PH_FWD_IDLE;
DPRINTK (KERN_DEBUG "%s: In compatibility (forward idle) mode\n",
port->name);
pr_debug("%s: In compatibility (forward idle) mode\n", port->name);
}
#endif /* IEEE1284 support */
@ -406,8 +396,7 @@ int parport_negotiate (struct parport *port, int mode)
PARPORT_CONTROL_SELECT
| PARPORT_CONTROL_AUTOFD,
PARPORT_CONTROL_SELECT);
DPRINTK (KERN_DEBUG
"%s: Peripheral not IEEE1284 compliant (0x%02X)\n",
pr_debug("%s: Peripheral not IEEE1284 compliant (0x%02X)\n",
port->name, parport_read_status (port));
port->ieee1284.phase = IEEE1284_PH_FWD_IDLE;
return -1; /* Not IEEE1284 compliant */
@ -430,8 +419,7 @@ int parport_negotiate (struct parport *port, int mode)
PARPORT_STATUS_ACK,
PARPORT_STATUS_ACK)) {
/* This shouldn't really happen with a compliant device. */
DPRINTK (KERN_DEBUG
"%s: Mode 0x%02x not supported? (0x%02x)\n",
pr_debug("%s: Mode 0x%02x not supported? (0x%02x)\n",
port->name, mode, port->ops->read_status (port));
parport_ieee1284_terminate (port);
return 1;
@ -442,7 +430,7 @@ int parport_negotiate (struct parport *port, int mode)
/* xflag should be high for all modes other than nibble (0). */
if (mode && !xflag) {
/* Mode not supported. */
DPRINTK (KERN_DEBUG "%s: Mode 0x%02x rejected by peripheral\n",
pr_debug("%s: Mode 0x%02x rejected by peripheral\n",
port->name, mode);
parport_ieee1284_terminate (port);
return 1;
@ -463,9 +451,7 @@ int parport_negotiate (struct parport *port, int mode)
/* Event 52: nAck goes low */
if (parport_wait_peripheral (port, PARPORT_STATUS_ACK, 0)) {
/* This peripheral is _very_ slow. */
DPRINTK (KERN_DEBUG
"%s: Event 52 didn't happen\n",
port->name);
pr_debug("%s: Event 52 didn't happen\n", port->name);
parport_ieee1284_terminate (port);
return 1;
}
@ -481,10 +467,9 @@ int parport_negotiate (struct parport *port, int mode)
PARPORT_STATUS_ACK)) {
/* This shouldn't really happen with a compliant
* device. */
DPRINTK (KERN_DEBUG
"%s: Mode 0x%02x not supported? (0x%02x)\n",
pr_debug("%s: Mode 0x%02x not supported? (0x%02x)\n",
port->name, mode,
port->ops->read_status (port));
port->ops->read_status(port));
parport_ieee1284_terminate (port);
return 1;
}
@ -495,8 +480,8 @@ int parport_negotiate (struct parport *port, int mode)
/* xflag should be high. */
if (!xflag) {
/* Extended mode not supported. */
DPRINTK (KERN_DEBUG "%s: Extended mode 0x%02x not "
"supported\n", port->name, mode);
pr_debug("%s: Extended mode 0x%02x not supported\n",
port->name, mode);
parport_ieee1284_terminate (port);
return 1;
}
@ -505,7 +490,7 @@ int parport_negotiate (struct parport *port, int mode)
}
/* Mode is supported */
DPRINTK (KERN_DEBUG "%s: In mode 0x%02x\n", port->name, mode);
pr_debug("%s: In mode 0x%02x\n", port->name, mode);
port->ieee1284.mode = mode;
/* But ECP is special */
@ -522,13 +507,11 @@ int parport_negotiate (struct parport *port, int mode)
PARPORT_STATUS_PAPEROUT,
PARPORT_STATUS_PAPEROUT);
if (r) {
DPRINTK (KERN_INFO "%s: Timeout at event 31\n",
port->name);
pr_debug("%s: Timeout at event 31\n", port->name);
}
port->ieee1284.phase = IEEE1284_PH_FWD_IDLE;
DPRINTK (KERN_DEBUG "%s: ECP direction: forward\n",
port->name);
pr_debug("%s: ECP direction: forward\n", port->name);
} else switch (mode) {
case IEEE1284_MODE_NIBBLE:
case IEEE1284_MODE_BYTE:
@ -573,7 +556,7 @@ void parport_ieee1284_interrupt (void *handle)
if (port->ieee1284.phase == IEEE1284_PH_REV_IDLE) {
/* An interrupt in this phase means that data
* is now available. */
DPRINTK (KERN_DEBUG "%s: Data available\n", port->name);
pr_debug("%s: Data available\n", port->name);
parport_ieee1284_ack_data_avail (port);
}
#endif /* IEEE1284 support */
@ -617,13 +600,12 @@ ssize_t parport_write (struct parport *port, const void *buffer, size_t len)
parport_negotiate (port, IEEE1284_MODE_COMPAT);
/* fall through */
case IEEE1284_MODE_COMPAT:
DPRINTK (KERN_DEBUG "%s: Using compatibility mode\n",
port->name);
pr_debug("%s: Using compatibility mode\n", port->name);
fn = port->ops->compat_write_data;
break;
case IEEE1284_MODE_EPP:
DPRINTK (KERN_DEBUG "%s: Using EPP mode\n", port->name);
pr_debug("%s: Using EPP mode\n", port->name);
if (addr) {
fn = port->ops->epp_write_addr;
} else {
@ -631,8 +613,7 @@ ssize_t parport_write (struct parport *port, const void *buffer, size_t len)
}
break;
case IEEE1284_MODE_EPPSWE:
DPRINTK (KERN_DEBUG "%s: Using software-emulated EPP mode\n",
port->name);
pr_debug("%s: Using software-emulated EPP mode\n", port->name);
if (addr) {
fn = parport_ieee1284_epp_write_addr;
} else {
@ -641,7 +622,7 @@ ssize_t parport_write (struct parport *port, const void *buffer, size_t len)
break;
case IEEE1284_MODE_ECP:
case IEEE1284_MODE_ECPRLE:
DPRINTK (KERN_DEBUG "%s: Using ECP mode\n", port->name);
pr_debug("%s: Using ECP mode\n", port->name);
if (addr) {
fn = port->ops->ecp_write_addr;
} else {
@ -650,8 +631,7 @@ ssize_t parport_write (struct parport *port, const void *buffer, size_t len)
break;
case IEEE1284_MODE_ECPSWE:
DPRINTK (KERN_DEBUG "%s: Using software-emulated ECP mode\n",
port->name);
pr_debug("%s: Using software-emulated ECP mode\n", port->name);
/* The caller has specified that it must be emulated,
* even if we have ECP hardware! */
if (addr) {
@ -662,13 +642,13 @@ ssize_t parport_write (struct parport *port, const void *buffer, size_t len)
break;
default:
DPRINTK (KERN_DEBUG "%s: Unknown mode 0x%02x\n", port->name,
port->ieee1284.mode);
pr_debug("%s: Unknown mode 0x%02x\n",
port->name, port->ieee1284.mode);
return -ENOSYS;
}
retval = (*fn) (port, buffer, len, 0);
DPRINTK (KERN_DEBUG "%s: wrote %d/%d bytes\n", port->name, retval, len);
pr_debug("%s: wrote %zd/%zu bytes\n", port->name, retval, len);
return retval;
#endif /* IEEE1284 support */
}
@ -715,7 +695,7 @@ ssize_t parport_read (struct parport *port, void *buffer, size_t len)
if ((port->physport->modes & PARPORT_MODE_TRISTATE) &&
!parport_negotiate (port, IEEE1284_MODE_BYTE)) {
/* got into BYTE mode OK */
DPRINTK (KERN_DEBUG "%s: Using byte mode\n", port->name);
pr_debug("%s: Using byte mode\n", port->name);
fn = port->ops->byte_read_data;
break;
}
@ -724,17 +704,17 @@ ssize_t parport_read (struct parport *port, void *buffer, size_t len)
}
/* fall through - to NIBBLE */
case IEEE1284_MODE_NIBBLE:
DPRINTK (KERN_DEBUG "%s: Using nibble mode\n", port->name);
pr_debug("%s: Using nibble mode\n", port->name);
fn = port->ops->nibble_read_data;
break;
case IEEE1284_MODE_BYTE:
DPRINTK (KERN_DEBUG "%s: Using byte mode\n", port->name);
pr_debug("%s: Using byte mode\n", port->name);
fn = port->ops->byte_read_data;
break;
case IEEE1284_MODE_EPP:
DPRINTK (KERN_DEBUG "%s: Using EPP mode\n", port->name);
pr_debug("%s: Using EPP mode\n", port->name);
if (addr) {
fn = port->ops->epp_read_addr;
} else {
@ -742,8 +722,7 @@ ssize_t parport_read (struct parport *port, void *buffer, size_t len)
}
break;
case IEEE1284_MODE_EPPSWE:
DPRINTK (KERN_DEBUG "%s: Using software-emulated EPP mode\n",
port->name);
pr_debug("%s: Using software-emulated EPP mode\n", port->name);
if (addr) {
fn = parport_ieee1284_epp_read_addr;
} else {
@ -752,19 +731,18 @@ ssize_t parport_read (struct parport *port, void *buffer, size_t len)
break;
case IEEE1284_MODE_ECP:
case IEEE1284_MODE_ECPRLE:
DPRINTK (KERN_DEBUG "%s: Using ECP mode\n", port->name);
pr_debug("%s: Using ECP mode\n", port->name);
fn = port->ops->ecp_read_data;
break;
case IEEE1284_MODE_ECPSWE:
DPRINTK (KERN_DEBUG "%s: Using software-emulated ECP mode\n",
port->name);
pr_debug("%s: Using software-emulated ECP mode\n", port->name);
fn = parport_ieee1284_ecp_read_data;
break;
default:
DPRINTK (KERN_DEBUG "%s: Unknown mode 0x%02x\n", port->name,
port->physport->ieee1284.mode);
pr_debug("%s: Unknown mode 0x%02x\n",
port->name, port->physport->ieee1284.mode);
return -ENOSYS;
}

67
drivers/parport/ieee1284_ops.c
View File

@ -27,12 +27,6 @@
#undef DEBUG /* Don't want a garbled console */
#endif
#ifdef DEBUG
#define DPRINTK(stuff...) printk (stuff)
#else
#define DPRINTK(stuff...)
#endif
/*** *
* One-way data transfer functions. *
* ***/
@ -115,7 +109,7 @@ size_t parport_ieee1284_write_compat (struct parport *port,
if (signal_pending (current))
break;
DPRINTK (KERN_DEBUG "%s: Timed out\n", port->name);
pr_debug("%s: Timed out\n", port->name);
break;
ready:
@ -178,9 +172,8 @@ size_t parport_ieee1284_read_nibble (struct parport *port,
if (parport_wait_peripheral (port,
PARPORT_STATUS_ACK, 0)) {
/* Timeout -- no more data? */
DPRINTK (KERN_DEBUG
"%s: Nibble timeout at event 9 (%d bytes)\n",
port->name, i/2);
pr_debug("%s: Nibble timeout at event 9 (%d bytes)\n",
port->name, i / 2);
parport_frob_control (port, PARPORT_CONTROL_AUTOFD, 0);
break;
}
@ -201,8 +194,7 @@ size_t parport_ieee1284_read_nibble (struct parport *port,
PARPORT_STATUS_ACK,
PARPORT_STATUS_ACK)) {
/* Timeout -- no more data? */
DPRINTK (KERN_DEBUG
"%s: Nibble timeout at event 11\n",
pr_debug("%s: Nibble timeout at event 11\n",
port->name);
break;
}
@ -219,9 +211,8 @@ size_t parport_ieee1284_read_nibble (struct parport *port,
/* Read the last nibble without checking data avail. */
if (parport_read_status (port) & PARPORT_STATUS_ERROR) {
end_of_data:
DPRINTK (KERN_DEBUG
"%s: No more nibble data (%d bytes)\n",
port->name, i/2);
pr_debug("%s: No more nibble data (%d bytes)\n",
port->name, i / 2);
/* Go to reverse idle phase. */
parport_frob_control (port,
@ -272,8 +263,7 @@ size_t parport_ieee1284_read_byte (struct parport *port,
/* Timeout -- no more data? */
parport_frob_control (port, PARPORT_CONTROL_AUTOFD,
0);
DPRINTK (KERN_DEBUG "%s: Byte timeout at event 9\n",
port->name);
pr_debug("%s: Byte timeout at event 9\n", port->name);
break;
}
@ -288,8 +278,7 @@ size_t parport_ieee1284_read_byte (struct parport *port,
PARPORT_STATUS_ACK,
PARPORT_STATUS_ACK)) {
/* Timeout -- no more data? */
DPRINTK (KERN_DEBUG "%s: Byte timeout at event 11\n",
port->name);
pr_debug("%s: Byte timeout at event 11\n", port->name);
break;
}
@ -307,8 +296,7 @@ size_t parport_ieee1284_read_byte (struct parport *port,
/* Read the last byte without checking data avail. */
if (parport_read_status (port) & PARPORT_STATUS_ERROR) {
end_of_data:
DPRINTK (KERN_DEBUG
"%s: No more byte data (%zd bytes)\n",
pr_debug("%s: No more byte data (%zd bytes)\n",
port->name, count);
/* Go to reverse idle phase. */
@ -353,12 +341,10 @@ int ecp_forward_to_reverse (struct parport *port)
PARPORT_STATUS_PAPEROUT, 0);
if (!retval) {
DPRINTK (KERN_DEBUG "%s: ECP direction: reverse\n",
port->name);
pr_debug("%s: ECP direction: reverse\n", port->name);
port->ieee1284.phase = IEEE1284_PH_REV_IDLE;
} else {
DPRINTK (KERN_DEBUG "%s: ECP direction: failed to reverse\n",
port->name);
pr_debug("%s: ECP direction: failed to reverse\n", port->name);
port->ieee1284.phase = IEEE1284_PH_ECP_DIR_UNKNOWN;
}
@ -384,12 +370,10 @@ int ecp_reverse_to_forward (struct parport *port)
if (!retval) {
parport_data_forward (port);
DPRINTK (KERN_DEBUG "%s: ECP direction: forward\n",
port->name);
pr_debug("%s: ECP direction: forward\n", port->name);
port->ieee1284.phase = IEEE1284_PH_FWD_IDLE;
} else {
DPRINTK (KERN_DEBUG
"%s: ECP direction: failed to switch forward\n",
pr_debug("%s: ECP direction: failed to switch forward\n",
port->name);
port->ieee1284.phase = IEEE1284_PH_ECP_DIR_UNKNOWN;
}
@ -450,7 +434,7 @@ size_t parport_ieee1284_ecp_write_data (struct parport *port,
}
/* Time for Host Transfer Recovery (page 41 of IEEE1284) */
DPRINTK (KERN_DEBUG "%s: ECP transfer stalled!\n", port->name);
pr_debug("%s: ECP transfer stalled!\n", port->name);
parport_frob_control (port, PARPORT_CONTROL_INIT,
PARPORT_CONTROL_INIT);
@ -466,8 +450,7 @@ size_t parport_ieee1284_ecp_write_data (struct parport *port,
if (!(parport_read_status (port) & PARPORT_STATUS_PAPEROUT))
break;
DPRINTK (KERN_DEBUG "%s: Host transfer recovered\n",
port->name);
pr_debug("%s: Host transfer recovered\n", port->name);
if (time_after_eq (jiffies, expire)) break;
goto try_again;
@ -565,23 +548,20 @@ size_t parport_ieee1284_ecp_read_data (struct parport *port,
command or a normal data byte, don't accept it. */
if (command) {
if (byte & 0x80) {
DPRINTK (KERN_DEBUG "%s: stopping short at "
"channel command (%02x)\n",
pr_debug("%s: stopping short at channel command (%02x)\n",
port->name, byte);
goto out;
}
else if (port->ieee1284.mode != IEEE1284_MODE_ECPRLE)
DPRINTK (KERN_DEBUG "%s: device illegally "
"using RLE; accepting anyway\n",
pr_debug("%s: device illegally using RLE; accepting anyway\n",
port->name);
rle_count = byte + 1;
/* Are we allowed to read that many bytes? */
if (rle_count > (len - count)) {
DPRINTK (KERN_DEBUG "%s: leaving %d RLE bytes "
"for next time\n", port->name,
rle_count);
pr_debug("%s: leaving %d RLE bytes for next time\n",
port->name, rle_count);
break;
}
@ -596,7 +576,7 @@ size_t parport_ieee1284_ecp_read_data (struct parport *port,
PARPORT_STATUS_ACK)) {
/* It's gone wrong. Return what data we have
to the caller. */
DPRINTK (KERN_DEBUG "ECP read timed out at 45\n");
pr_debug("ECP read timed out at 45\n");
if (command)
printk (KERN_WARNING
@ -620,7 +600,7 @@ size_t parport_ieee1284_ecp_read_data (struct parport *port,
memset (buf, byte, rle_count);
buf += rle_count;
count += rle_count;
DPRINTK (KERN_DEBUG "%s: decompressed to %d bytes\n",
pr_debug("%s: decompressed to %d bytes\n",
port->name, rle_count);
} else {
/* Normal data byte. */
@ -686,7 +666,7 @@ size_t parport_ieee1284_ecp_write_addr (struct parport *port,
}
/* Time for Host Transfer Recovery (page 41 of IEEE1284) */
DPRINTK (KERN_DEBUG "%s: ECP transfer stalled!\n", port->name);
pr_debug("%s: ECP transfer stalled!\n", port->name);
parport_frob_control (port, PARPORT_CONTROL_INIT,
PARPORT_CONTROL_INIT);
@ -702,8 +682,7 @@ size_t parport_ieee1284_ecp_write_addr (struct parport *port,
if (!(parport_read_status (port) & PARPORT_STATUS_PAPEROUT))
break;
DPRINTK (KERN_DEBUG "%s: Host transfer recovered\n",
port->name);
pr_debug("%s: Host transfer recovered\n", port->name);
if (time_after_eq (jiffies, expire)) break;
goto try_again;