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tty: cpm_uart: use resource_size()

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Use the resource_size function instead of manually calculating the
resource size.  This reduces the chance of introducing off-by-one errors.

Signed-off-by: Tobias Klauser <[email protected]>
Cc: Alan Cox <[email protected]>
Cc: Kumar Gala <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Tobias Klauser 2010-03-11 14:08:18 -08:00 • committed by Greg Kroah-Hartman
commit 2314436658
1 changed files with 2 additions and 2 deletions
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4
drivers/serial/cpm_uart/cpm_uart_cpm2.c
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@ -61,7 +61,7 @@ void __iomem *cpm_uart_map_pram(struct uart_cpm_port *port,
void __iomem *pram;
unsigned long offset;
struct resource res;
unsigned long len;
resource_size_t len;
/* Don't remap parameter RAM if it has already been initialized
* during console setup.
@ -74,7 +74,7 @@ void __iomem *cpm_uart_map_pram(struct uart_cpm_port *port,
if (of_address_to_resource(np, 1, &res))
return NULL;
len = 1 + res.end - res.start;
len = resource_size(&res);
pram = ioremap(res.start, len);
if (!pram)
return NULL;