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ftl: should pre-allocate eblock for car case

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Signed-off-by: wanggang26 <wanggang26@xiaomi.com>
This commit is contained in:
wanggang26 2024-07-20 14:39:40 +08:00 committed by Xiang Xiao
parent 97d684847b
commit 702068e62c
1 changed files with 20 additions and 35 deletions
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53
drivers/mtd/ftl.c
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@ -215,6 +215,18 @@ static int ftl_open(FAR struct inode *inode)
DEBUGASSERT(inode->i_private);
dev = inode->i_private;
if (dev->refs == 0)
{
/* Allocate one, in-memory erase block buffer */
dev->eblock = kmm_malloc(dev->geo.erasesize);
if (!dev->eblock)
{
ferr("ERROR: Failed to allocate an erase block buffer\n");
return -ENOMEM;
}
}
dev->refs++;
return OK;
}
@ -237,18 +249,21 @@ static int ftl_close(FAR struct inode *inode)
rwb_flush(&dev->rwb);
#endif
if (--dev->refs == 0 && dev->unlinked)
if (--dev->refs == 0)
{
#ifdef FTL_HAVE_RWBUFFER
rwb_uninitialize(&dev->rwb);
#endif
if (dev->eblock)
{
kmm_free(dev->eblock);
}
if (dev->unlinked)
{
#ifdef FTL_HAVE_RWBUFFER
rwb_uninitialize(&dev->rwb);
#endif
kmm_free(dev);
}
}
return OK;
}
@ -461,18 +476,6 @@ static ssize_t ftl_read(FAR struct inode *inode, unsigned char *buffer,
*
****************************************************************************/
static int ftl_alloc_eblock(FAR struct ftl_struct_s *dev)
{
if (dev->eblock == NULL)
{
/* Allocate one, in-memory erase block buffer */
dev->eblock = kmm_malloc(dev->geo.erasesize);
}
return dev->eblock != NULL ? OK : -ENOMEM;
}
static ssize_t ftl_flush(FAR void *priv, FAR const uint8_t *buffer,
off_t startblock, size_t nblocks)
{
@ -504,13 +507,6 @@ static ssize_t ftl_flush(FAR void *priv, FAR const uint8_t *buffer,
bool short_write = (remaining < (alignedblock - startblock));
ret = ftl_alloc_eblock(dev);
if (ret < 0)
{
ferr("ERROR: Failed to allocate an erase block buffer\n");
return ret;
}
/* Read the full erase block into the buffer */
rwblock = startblock & ~mask;
@ -604,13 +600,6 @@ static ssize_t ftl_flush(FAR void *priv, FAR const uint8_t *buffer,
if (remaining > 0)
{
ret = ftl_alloc_eblock(dev);
if (ret < 0)
{
ferr("ERROR: Failed to allocate an erase block buffer\n");
return ret;
}
/* Read the full erase block into the buffer */
nxfrd = ftl_mtd_bread(dev, alignedblock, dev->blkper, dev->eblock);
@ -767,10 +756,6 @@ static int ftl_unlink(FAR struct inode *inode)
#ifdef FTL_HAVE_RWBUFFER
rwb_uninitialize(&dev->rwb);
#endif
if (dev->eblock)
{
kmm_free(dev->eblock);
}
kmm_free(dev);
}