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wcaxx: Add extra dummy read when checking for single fxs modules.

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This extra read eliminates some problems with detecting certain S100M modules.
It is unclear at this time why it is necessary.

Signed-off-by: Shaun Ruffell <sruffell@digium.com>
This commit is contained in:
Shaun Ruffell 2013-12-02 14:43:46 -06:00
parent 0faac26dde
commit d389f9f743
1 changed files with 4 additions and 0 deletions
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4
drivers/dahdi/wcaxx-base.c
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@ -3610,6 +3610,10 @@ static bool check_for_single_fxs(struct wcaxx *wc, unsigned int port)
result = wcaxx_init_fxs_port(wc, mod); result = wcaxx_init_fxs_port(wc, mod);
if (!result) if (!result)
mod->type = NONE; mod->type = NONE;
/* It is currently unclear why this read is necessary for some of the
* S100M modules to properly function. */
wcaxx_getreg(wc, mod, 0x00);
return result; return result;
} }