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tty: cpm_uart: use resource_size()
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 <tklauser@distanz.ch> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Kumar Gala <galak@gate.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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1 changed files with 2 additions and 2 deletions
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@ -61,7 +61,7 @@ void __iomem *cpm_uart_map_pram(struct uart_cpm_port *port,
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void __iomem *pram;
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unsigned long offset;
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struct resource res;
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unsigned long len;
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resource_size_t len;
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/* Don't remap parameter RAM if it has already been initialized
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* during console setup.
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@ -74,7 +74,7 @@ void __iomem *cpm_uart_map_pram(struct uart_cpm_port *port,
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if (of_address_to_resource(np, 1, &res))
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return NULL;
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len = 1 + res.end - res.start;
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len = resource_size(&res);
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pram = ioremap(res.start, len);
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if (!pram)
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return NULL;
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