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Bring back read page alignmnet

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This commit is contained in:
Michal Moskal 2017-07-26 11:52:51 +01:00
parent 33863b8b96
commit f4c9e85924
1 changed files with 2 additions and 8 deletions
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10
brick/kernel/f_mass_storage.c
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@ -709,9 +709,7 @@ static int do_read(struct fsg_common *common)
u32 amount_left; u32 amount_left;
loff_t file_offset, file_offset_tmp; loff_t file_offset, file_offset_tmp;
unsigned int amount; unsigned int amount;
// partial_page handling causes hangs unsigned int partial_page;
// same thing in do_write() --mmoskal
//unsigned int partial_page;
ssize_t nread; ssize_t nread;
/* Get the starting Logical Block Address and check that it's /* Get the starting Logical Block Address and check that it's
@ -756,12 +754,10 @@ static int do_read(struct fsg_common *common)
amount = min(amount_left, FSG_BUFLEN); amount = min(amount_left, FSG_BUFLEN);
amount = min((loff_t) amount, amount = min((loff_t) amount,
curlun->file_length - file_offset); curlun->file_length - file_offset);
/*
partial_page = file_offset & (PAGE_CACHE_SIZE - 1); partial_page = file_offset & (PAGE_CACHE_SIZE - 1);
if (partial_page > 0) if (partial_page > 0)
amount = min(amount, (unsigned int) PAGE_CACHE_SIZE - amount = min(amount, (unsigned int) PAGE_CACHE_SIZE -
partial_page); partial_page);
*/
/* Wait for the next buffer to become available */ /* Wait for the next buffer to become available */
bh = common->next_buffhd_to_fill; bh = common->next_buffhd_to_fill;
while (bh->state != BUF_STATE_EMPTY) { while (bh->state != BUF_STATE_EMPTY) {
@ -844,7 +840,7 @@ static int do_write(struct fsg_common *common)
u32 amount_left_to_req, amount_left_to_write; u32 amount_left_to_req, amount_left_to_write;
loff_t usb_offset, file_offset, file_offset_tmp; loff_t usb_offset, file_offset, file_offset_tmp;
unsigned int amount; unsigned int amount;
//unsigned int partial_page; unsigned int partial_page;
ssize_t nwritten; ssize_t nwritten;
int rc; int rc;
@ -908,12 +904,10 @@ static int do_write(struct fsg_common *common)
amount = min(amount_left_to_req, FSG_BUFLEN); amount = min(amount_left_to_req, FSG_BUFLEN);
amount = min((loff_t) amount, curlun->file_length - amount = min((loff_t) amount, curlun->file_length -
usb_offset); usb_offset);
/*
partial_page = usb_offset & (PAGE_CACHE_SIZE - 1); partial_page = usb_offset & (PAGE_CACHE_SIZE - 1);
if (partial_page > 0) if (partial_page > 0)
amount = min(amount, amount = min(amount,
(unsigned int) PAGE_CACHE_SIZE - partial_page); (unsigned int) PAGE_CACHE_SIZE - partial_page);
*/
if (amount == 0) { if (amount == 0) {
get_some_more = 0; get_some_more = 0;