From: Christoph Hellwig <hch@lst.de>
To: viro@zeniv.linux.org.uk
Cc: arve@android.com, riandrews@android.com,
linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 12/16] gadget/f_mass_storage: stop messing with the address limit
Date: Wed, 30 Aug 2017 17:00:03 +0200 [thread overview]
Message-ID: <20170830150007.3953-13-hch@lst.de> (raw)
In-Reply-To: <20170830150007.3953-1-hch@lst.de>
Instead use kernel_read/write consistently, which also makes sparse
happy.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
drivers/usb/gadget/function/f_mass_storage.c | 21 ++++++---------------
1 file changed, 6 insertions(+), 15 deletions(-)
diff --git a/drivers/usb/gadget/function/f_mass_storage.c b/drivers/usb/gadget/function/f_mass_storage.c
index f95bddd6513f..d6bd0244b008 100644
--- a/drivers/usb/gadget/function/f_mass_storage.c
+++ b/drivers/usb/gadget/function/f_mass_storage.c
@@ -686,9 +686,8 @@ static int do_read(struct fsg_common *common)
/* Perform the read */
file_offset_tmp = file_offset;
- nread = vfs_read(curlun->filp,
- (char __user *)bh->buf,
- amount, &file_offset_tmp);
+ nread = kernel_read(curlun->filp, bh->buf, amount,
+ &file_offset_tmp);
VLDBG(curlun, "file read %u @ %llu -> %d\n", amount,
(unsigned long long)file_offset, (int)nread);
if (signal_pending(current))
@@ -883,8 +882,8 @@ static int do_write(struct fsg_common *common)
/* Perform the write */
file_offset_tmp = file_offset;
- nwritten = vfs_write(curlun->filp, (char __user *)bh->buf,
- amount, &file_offset_tmp);
+ nwritten = kernel_write(curlun->filp, bh->buf, amount,
+ &file_offset_tmp);
VLDBG(curlun, "file write %u @ %llu -> %d\n", amount,
(unsigned long long)file_offset, (int)nwritten);
if (signal_pending(current))
@@ -1021,9 +1020,8 @@ static int do_verify(struct fsg_common *common)
/* Perform the read */
file_offset_tmp = file_offset;
- nread = vfs_read(curlun->filp,
- (char __user *) bh->buf,
- amount, &file_offset_tmp);
+ nread = kernel_read(curlun->filp, bh->buf, amount,
+ &file_offset_tmp);
VLDBG(curlun, "file read %u @ %llu -> %d\n", amount,
(unsigned long long) file_offset,
(int) nread);
@@ -2453,13 +2451,6 @@ static int fsg_main_thread(void *common_)
/* Allow the thread to be frozen */
set_freezable();
- /*
- * Arrange for userspace references to be interpreted as kernel
- * pointers. That way we can pass a kernel pointer to a routine
- * that expects a __user pointer and it will work okay.
- */
- set_fs(get_ds());
-
/* The main loop */
while (common->state != FSG_STATE_TERMINATED) {
if (exception_in_progress(common) || signal_pending(current)) {
--
2.11.0
next prev parent reply other threads:[~2017-08-30 15:00 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-30 14:59 switch in-kernel read/write calls to kernel_read/write Christoph Hellwig
2017-08-30 14:59 ` [PATCH 01/16] ashmem: switch to ->read_iter Christoph Hellwig
2017-08-30 15:28 ` Al Viro
2017-09-01 10:20 ` Christoph Hellwig
2017-08-30 14:59 ` [PATCH 02/16] autofs4: switch autofs4_write to __kernel_write Christoph Hellwig
2017-08-30 15:30 ` Al Viro
2017-09-01 10:22 ` Christoph Hellwig
2017-08-30 14:59 ` [PATCH 03/16] fs: move kernel_write to fs/read_write.c Christoph Hellwig
2017-08-30 14:59 ` [PATCH 04/16] fs: move kernel_read " Christoph Hellwig
2017-08-30 14:59 ` [PATCH 05/16] fs: fix kernel_read prototype Christoph Hellwig
2017-08-30 15:37 ` Al Viro
2017-09-01 10:37 ` Christoph Hellwig
2017-08-30 14:59 ` [PATCH 06/16] fs: fix kernel_write prototype Christoph Hellwig
2017-08-30 15:39 ` Al Viro
2017-09-01 10:40 ` Christoph Hellwig
2017-08-30 14:59 ` [PATCH 07/16] serial2002: switch serial2002_tty_write to kernel_{read/write} Christoph Hellwig
2017-08-30 14:59 ` [PATCH 08/16] mm/nommu: switch do_mmap_private to kernel_read Christoph Hellwig
2017-08-30 15:41 ` Al Viro
2017-09-01 10:41 ` Christoph Hellwig
2017-08-30 15:00 ` [PATCH 09/16] net/9p: switch p9_fd_read to kernel_write Christoph Hellwig
2017-08-30 15:00 ` [PATCH 10/16] btrfs: switch write_buf " Christoph Hellwig
2017-08-30 15:35 ` Nikolay Borisov
2017-08-30 15:00 ` [PATCH 11/16] mconsole: switch to kernel_read Christoph Hellwig
2017-08-30 15:00 ` Christoph Hellwig [this message]
2017-08-30 15:00 ` [PATCH 13/16] lustre: switch to kernel_write Christoph Hellwig
2017-08-30 15:00 ` [PATCH 14/16] fs: unexport __vfs_read/__vfs_write Christoph Hellwig
2017-08-30 15:00 ` [PATCH 15/16] fs: unexport vfs_read and vfs_write Christoph Hellwig
2017-08-30 15:00 ` [PATCH 16/16] fs: unexport vfs_readv and vfs_writev Christoph Hellwig
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