On 03/07/2011 09:27 AM, Jeff Garzik wrote:
> On 03/07/2011 02:57 AM, Hannes Reinecke wrote:
>> On 03/04/2011 06:22 PM, Jeff Garzik wrote:
>>> And if you're highly motivated, a separate patch to update
>>> include/linux/ata.h to return bool for obvious ata_id_has_xxx functions
>>> would be nice too.
>
>> Like this?
>
>> -static inline int ata_id_has_fua(const u16 *id)
>> +static inline bool ata_id_has_fua(const u16 *id)
>> {
>> if ((id[ATA_ID_CFSSE] & 0xC000) != 0x4000)
>> return 0;
>> return id[ATA_ID_CFSSE] & (1 << 6);
>> }
>
> Not _quite_ that easy... one must also s/0/false/ and s/1/true/ where
> the return value is explicit, rather than the result of an expression.
>
Ok, there you go.
Cheers,
Hannes
--
Dr. Hannes Reinecke zSeries & Storage
hare@xxxxxxx +49 911 74053 688
SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: Markus Rex, HRB 16746 (AG Nürnberg)
>From 8504e96908fb272c53278b7845bc63679f238358 Mon Sep 17 00:00:00 2001
From: Hannes Reinecke <hare@xxxxxxx>
Date: Mon, 7 Mar 2011 08:43:37 +0100
Subject: [PATCH] libata: Use 'bool' return value for ata_id_XXX
Most ata_id_XXX inlines are simple tests, so we should set
the return value to 'bool' here.
Signed-off-by: Hannes Reinecke <hare@xxxxxxx>
diff --git a/include/linux/ata.h b/include/linux/ata.h
index 198e1ea..1868213 100644
--- a/include/linux/ata.h
+++ b/include/linux/ata.h
@@ -600,42 +600,42 @@ static inline bool ata_id_has_dipm(const u16 *id)
}
-static inline int ata_id_has_fua(const u16 *id)
+static inline bool ata_id_has_fua(const u16 *id)
{
if ((id[ATA_ID_CFSSE] & 0xC000) != 0x4000)
- return 0;
+ return false;
return id[ATA_ID_CFSSE] & (1 << 6);
}
-static inline int ata_id_has_flush(const u16 *id)
+static inline bool ata_id_has_flush(const u16 *id)
{
if ((id[ATA_ID_COMMAND_SET_2] & 0xC000) != 0x4000)
- return 0;
+ return false;
return id[ATA_ID_COMMAND_SET_2] & (1 << 12);
}
-static inline int ata_id_flush_enabled(const u16 *id)
+static inline bool ata_id_flush_enabled(const u16 *id)
{
if (ata_id_has_flush(id) == 0)
- return 0;
+ return false;
if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000)
- return 0;
+ return false;
return id[ATA_ID_CFS_ENABLE_2] & (1 << 12);
}
-static inline int ata_id_has_flush_ext(const u16 *id)
+static inline bool ata_id_has_flush_ext(const u16 *id)
{
if ((id[ATA_ID_COMMAND_SET_2] & 0xC000) != 0x4000)
- return 0;
+ return false;
return id[ATA_ID_COMMAND_SET_2] & (1 << 13);
}
-static inline int ata_id_flush_ext_enabled(const u16 *id)
+static inline bool ata_id_flush_ext_enabled(const u16 *id)
{
if (ata_id_has_flush_ext(id) == 0)
- return 0;
+ return false;
if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000)
- return 0;
+ return false;
/*
* some Maxtor disks have bit 13 defined incorrectly
* so check bit 10 too
@@ -688,64 +688,64 @@ static inline u16 ata_id_logical_sector_offset(const u16 *id,
return 0;
}
-static inline int ata_id_has_lba48(const u16 *id)
+static inline bool ata_id_has_lba48(const u16 *id)
{
if ((id[ATA_ID_COMMAND_SET_2] & 0xC000) != 0x4000)
- return 0;
+ return false;
if (!ata_id_u64(id, ATA_ID_LBA_CAPACITY_2))
- return 0;
+ return false;
return id[ATA_ID_COMMAND_SET_2] & (1 << 10);
}
-static inline int ata_id_lba48_enabled(const u16 *id)
+static inline bool ata_id_lba48_enabled(const u16 *id)
{
if (ata_id_has_lba48(id) == 0)
- return 0;
+ return false;
if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000)
- return 0;
+ return false;
return id[ATA_ID_CFS_ENABLE_2] & (1 << 10);
}
-static inline int ata_id_hpa_enabled(const u16 *id)
+static inline bool ata_id_hpa_enabled(const u16 *id)
{
/* Yes children, word 83 valid bits cover word 82 data */
if ((id[ATA_ID_COMMAND_SET_2] & 0xC000) != 0x4000)
- return 0;
+ return false;
/* And 87 covers 85-87 */
if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000)
- return 0;
+ return false;
/* Check command sets enabled as well as supported */
if ((id[ATA_ID_CFS_ENABLE_1] & (1 << 10)) == 0)
- return 0;
+ return false;
return id[ATA_ID_COMMAND_SET_1] & (1 << 10);
}
-static inline int ata_id_has_wcache(const u16 *id)
+static inline bool ata_id_has_wcache(const u16 *id)
{
/* Yes children, word 83 valid bits cover word 82 data */
if ((id[ATA_ID_COMMAND_SET_2] & 0xC000) != 0x4000)
- return 0;
+ return false;
return id[ATA_ID_COMMAND_SET_1] & (1 << 5);
}
-static inline int ata_id_has_pm(const u16 *id)
+static inline bool ata_id_has_pm(const u16 *id)
{
if ((id[ATA_ID_COMMAND_SET_2] & 0xC000) != 0x4000)
- return 0;
+ return false;
return id[ATA_ID_COMMAND_SET_1] & (1 << 3);
}
-static inline int ata_id_rahead_enabled(const u16 *id)
+static inline bool ata_id_rahead_enabled(const u16 *id)
{
if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000)
- return 0;
+ return false;
return id[ATA_ID_CFS_ENABLE_1] & (1 << 6);
}
-static inline int ata_id_wcache_enabled(const u16 *id)
+static inline bool ata_id_wcache_enabled(const u16 *id)
{
if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000)
- return 0;
+ return false;
return id[ATA_ID_CFS_ENABLE_1] & (1 << 5);
}
@@ -775,7 +775,7 @@ static inline unsigned int ata_id_major_version(const u16 *id)
return mver;
}
-static inline int ata_id_is_sata(const u16 *id)
+static inline bool ata_id_is_sata(const u16 *id)
{
/*
* See if word 93 is 0 AND drive is at least ATA-5 compatible
@@ -784,37 +784,35 @@ static inline int ata_id_is_sata(const u16 *id)
* 0x0000 and 0xffff along with the earlier ATA revisions...
*/
if (id[ATA_ID_HW_CONFIG] == 0 && (short)id[ATA_ID_MAJOR_VER] >= 0x0020)
- return 1;
- return 0;
+ return true;
+ return false;
}
-static inline int ata_id_has_tpm(const u16 *id)
+static inline bool ata_id_has_tpm(const u16 *id)
{
/* The TPM bits are only valid on ATA8 */
if (ata_id_major_version(id) < 8)
- return 0;
+ return false;
if ((id[48] & 0xC000) != 0x4000)
- return 0;
+ return false;
return id[48] & (1 << 0);
}
-static inline int ata_id_has_dword_io(const u16 *id)
+static inline bool ata_id_has_dword_io(const u16 *id)
{
/* ATA 8 reuses this flag for "trusted" computing */
if (ata_id_major_version(id) > 7)
- return 0;
- if (id[ATA_ID_DWORD_IO] & (1 << 0))
- return 1;
- return 0;
+ return false;
+ return id[ATA_ID_DWORD_IO] & (1 << 0);
}
-static inline int ata_id_has_unload(const u16 *id)
+static inline bool ata_id_has_unload(const u16 *id)
{
if (ata_id_major_version(id) >= 7 &&
(id[ATA_ID_CFSSE] & 0xC000) == 0x4000 &&
id[ATA_ID_CFSSE] & (1 << 13))
- return 1;
- return 0;
+ return true;
+ return false;
}
static inline bool ata_id_has_wwn(const u16 *id)
@@ -850,25 +848,25 @@ static inline int ata_id_rotation_rate(const u16 *id)
return val;
}
-static inline int ata_id_has_trim(const u16 *id)
+static inline bool ata_id_has_trim(const u16 *id)
{
if (ata_id_major_version(id) >= 7 &&
(id[ATA_ID_DATA_SET_MGMT] & 1))
- return 1;
- return 0;
+ return true;
+ return false;
}
-static inline int ata_id_has_zero_after_trim(const u16 *id)
+static inline bool ata_id_has_zero_after_trim(const u16 *id)
{
/* DSM supported, deterministic read, and read zero after trim set */
if (ata_id_has_trim(id) &&
(id[ATA_ID_ADDITIONAL_SUPP] & 0x4020) == 0x4020)
- return 1;
+ return true;
- return 0;
+ return false;
}
-static inline int ata_id_current_chs_valid(const u16 *id)
+static inline bool ata_id_current_chs_valid(const u16 *id)
{
/* For ATA-1 devices, if the INITIALIZE DEVICE PARAMETERS command
has not been issued to the device then the values of
@@ -880,11 +878,11 @@ static inline int ata_id_current_chs_valid(const u16 *id)
id[ATA_ID_CUR_SECTORS]; /* sectors in current translation */
}
-static inline int ata_id_is_cfa(const u16 *id)
+static inline bool ata_id_is_cfa(const u16 *id)
{
if ((id[ATA_ID_CONFIG] == 0x848A) || /* Traditional CF */
(id[ATA_ID_CONFIG] == 0x844A)) /* Delkin Devices CF */
- return 1;
+ return true;
/*
* CF specs don't require specific value in the word 0 anymore and yet
* they forbid to report the ATA version in the word 80 and require the
@@ -893,44 +891,40 @@ static inline int ata_id_is_cfa(const u16 *id)
* and while those that don't indicate CFA feature support need some
* sort of quirk list, it seems impractical for the ones that do...
*/
- if ((id[ATA_ID_COMMAND_SET_2] & 0xC004) == 0x4004)
- return 1;
- return 0;
+ return (id[ATA_ID_COMMAND_SET_2] & 0xC004) == 0x4004;
}
-static inline int ata_id_is_ssd(const u16 *id)
+static inline bool ata_id_is_ssd(const u16 *id)
{
return id[ATA_ID_ROT_SPEED] == 0x01;
}
-static inline int ata_id_pio_need_iordy(const u16 *id, const u8 pio)
+static inline bool ata_id_pio_need_iordy(const u16 *id, const u8 pio)
{
/* CF spec. r4.1 Table 22 says no IORDY on PIO5 and PIO6. */
if (pio > 4 && ata_id_is_cfa(id))
- return 0;
+ return false;
/* For PIO3 and higher it is mandatory. */
if (pio > 2)
- return 1;
+ return true;
/* Turn it on when possible. */
- if (ata_id_has_iordy(id))
- return 1;
- return 0;
+ return ata_id_has_iordy(id);
}
-static inline int ata_drive_40wire(const u16 *dev_id)
+static inline bool ata_drive_40wire(const u16 *dev_id)
{
if (ata_id_is_sata(dev_id))
- return 0; /* SATA */
- if ((dev_id[ATA_ID_HW_CONFIG] & 0xE000) == 0x6000)
- return 0; /* 80 wire */
- return 1;
+ return false; /* SATA */
+ if (dev_id[ATA_ID_HW_CONFIG] & 0xE000) == 0x6000;
+ return false; /* 80 wire */
+ return true;
}
-static inline int ata_drive_40wire_relaxed(const u16 *dev_id)
+static inline bool ata_drive_40wire_relaxed(const u16 *dev_id)
{
if ((dev_id[ATA_ID_HW_CONFIG] & 0x2000) == 0x2000)
- return 0; /* 80 wire */
- return 1;
+ return false; /* 80 wire */
+ return true;
}
static inline int atapi_cdb_len(const u16 *dev_id)
@@ -943,12 +937,12 @@ static inline int atapi_cdb_len(const u16 *dev_id)
}
}
-static inline int atapi_command_packet_set(const u16 *dev_id)
+static inline bool atapi_command_packet_set(const u16 *dev_id)
{
return (dev_id[ATA_ID_CONFIG] >> 8) & 0x1f;
}
-static inline int atapi_id_dmadir(const u16 *dev_id)
+static inline bool atapi_id_dmadir(const u16 *dev_id)
{
return ata_id_major_version(dev_id) >= 7 && (dev_id[62] & 0x8000);
}
@@ -961,13 +955,13 @@ static inline int atapi_id_dmadir(const u16 *dev_id)
*
* It is called only once for each device.
*/
-static inline int ata_id_is_lba_capacity_ok(u16 *id)
+static inline bool ata_id_is_lba_capacity_ok(u16 *id)
{
unsigned long lba_sects, chs_sects, head, tail;
/* No non-LBA info .. so valid! */
if (id[ATA_ID_CYLS] == 0)
- return 1;
+ return true;
lba_sects = ata_id_u32(id, ATA_ID_LBA_CAPACITY);
@@ -982,13 +976,13 @@ static inline int ata_id_is_lba_capacity_ok(u16 *id)
id[ATA_ID_SECTORS] == 63 &&
(id[ATA_ID_HEADS] == 15 || id[ATA_ID_HEADS] == 16) &&
(lba_sects >= 16383 * 63 * id[ATA_ID_HEADS]))
- return 1;
+ return true;
chs_sects = id[ATA_ID_CYLS] * id[ATA_ID_HEADS] * id[ATA_ID_SECTORS];
/* perform a rough sanity check on lba_sects: within 10% is OK */
if (lba_sects - chs_sects < chs_sects/10)
- return 1;
+ return true;
/* some drives have the word order reversed */
head = (lba_sects >> 16) & 0xffff;
@@ -997,10 +991,10 @@ static inline int ata_id_is_lba_capacity_ok(u16 *id)
if (lba_sects - chs_sects < chs_sects/10) {
*(__le32 *)&id[ATA_ID_LBA_CAPACITY] = __cpu_to_le32(lba_sects);
- return 1; /* LBA capacity is (now) good */
+ return true; /* LBA capacity is (now) good */
}
- return 0; /* LBA capacity value may be bad */
+ return false; /* LBA capacity value may be bad */
}
static inline void ata_id_to_hd_driveid(u16 *id)
@@ -1058,19 +1052,19 @@ static inline int is_multi_taskfile(struct ata_taskfile *tf)
(tf->command == ATA_CMD_WRITE_MULTI_FUA_EXT);
}
-static inline int ata_ok(u8 status)
+static inline bool ata_ok(u8 status)
{
return ((status & (ATA_BUSY | ATA_DRDY | ATA_DF | ATA_DRQ | ATA_ERR))
== ATA_DRDY);
}
-static inline int lba_28_ok(u64 block, u32 n_block)
+static inline bool lba_28_ok(u64 block, u32 n_block)
{
/* check the ending block number: must be LESS THAN 0x0fffffff */
return ((block + n_block) < ((1 << 28) - 1)) && (n_block <= 256);
}
-static inline int lba_48_ok(u64 block, u32 n_block)
+static inline bool lba_48_ok(u64 block, u32 n_block)
{
/* check the ending block number */
return ((block + n_block - 1) < ((u64)1 << 48)) && (n_block <= 65536);
