linux-stable.git/drivers/base/regmap/regmap-debugfs.c, branch v3.2.99

regmap: debugfs: Don't bother actually printing when calculating max length

2015-11-17T15:54:40+00:00

commit 176fc2d5770a0990eebff903ba680d2edd32e718 upstream.

The in kernel snprintf() will conveniently return the actual length of
the printed string even if not given an output beffer at all so just do
that rather than relying on the user to pass in a suitable buffer,
ensuring that we don't need to worry if the buffer was truncated due to
the size of the buffer passed in.

Reported-by: Rasmus Villemoes 
Signed-off-by: Mark Brown 
Signed-off-by: Ben Hutchings

regmap: debugfs: Ensure we don't underflow when printing access masks

2015-11-17T15:54:40+00:00

commit b763ec17ac762470eec5be8ebcc43e4f8b2c2b82 upstream.

If a read is attempted which is smaller than the line length then we may
underflow the subtraction we're doing with the unsigned size_t type so
move some of the calculation to be additions on the right hand side
instead in order to avoid this.

Reported-by: Rasmus Villemoes 
Signed-off-by: Mark Brown 
Signed-off-by: Ben Hutchings

regmap: debugfs: Avoid overflows for very small reads

2013-01-03T03:33:32+00:00

commit db04328c167ff8e7c57f4a3532214aeada3a82fd upstream.

If count is less than the size of a register then we may hit integer
wraparound when trying to move backwards to check if we're still in
the buffer. Instead move the position forwards to check if it's still
in the buffer, we are unlikely to be able to allocate a buffer
sufficiently big to overflow here.

Signed-off-by: Mark Brown 
[bwh: Backported to 3.2: formatted length is tot_len]
Signed-off-by: Ben Hutchings

regmap: Include the last register in debugfs output

2011-09-05T17:58:31+00:00

Off by one in the array iteration.

Reported-by: Jonathan Cameron 
Signed-off-by: Mark Brown

regmap: Provide access information via debugfs

2011-08-14T10:51:16+00:00

Let userspace know what the access map for the device is. This is helpful
for verifying that the access map is correctly configured and could also
be useful for programs that try to work with the data. File format is:

register: R W V P

where R, W, V and P are 'y' or 'n' showing readable, writable, volatile
and precious respectively.

Signed-off-by: Mark Brown

regmap: Share some of the debugfs infrastructure ready for more files

2011-08-14T10:51:14+00:00

Signed-off-by: Mark Brown

regmap: Add functions to check for access on registers

2011-08-14T10:51:11+00:00

We're going to be using these in quite a few places so factor out the
readable/writable/volatile/precious checks.

Signed-off-by: Mark Brown

regmap: Fix type of field width specifiers for x86_64

2011-08-09T15:26:38+00:00

x86_64 size_t is not an int but the printf format specifier for size_t
should be an int.

Signed-off-by: Mark Brown 
Reported-by: Stephen Rothwell

regmap: Skip precious registers when dumping registers via debugfs

2011-08-08T06:57:35+00:00

Signed-off-by: Mark Brown

regmap: Provide register map dump via debugfs

2011-08-08T06:57:00+00:00

Copy over the read parts of the ASoC debugfs implementation into regmap,
allowing users to see what the register values the device has are at
runtime. The implementation, especially the support for seeking, is
mostly due to Dimitris Papastamos' work in ASoC.

Signed-off-by: Mark Brown